Lenalidomide

1 INDICATIONS AND USAGE Lenalidomide is a thalidomide analogue indicated for the treatment of adult patients with: Multiple myeloma (MM), in combination with dexamethasone. ( 1.1 ) MM, as maintenance following autologous hematopoietic stem cell transplantation (auto-HSCT). ( 1.1 ) Transfusion-dependent anemia due to low- or intermediate-1-risk myelodysplastic syndromes (MDS) associated with a deletion 5q abnormality with or without additional cytogenetic abnormalities. ( 1.2 ) Limitations of Use: Lenalidomide capsules is not indicated and is not recommended for the treatment of patients with chronic lymphocytic leukemia (CLL) outside of controlled clinical trials. 1.1 Multiple Myeloma Lenalidomide capsules in combination with dexamethasone is indicated for the treatment of adult patients with multiple myeloma (MM). Lenalidomide capsules are indicated as maintenance therapy in adult patients with MM following autologous hematopoietic stem cell transplantation (auto-HSCT). 1.2 Myelodysplastic Syndromes Lenalidomide capsules is indicated for the treatment of adult patients with transfusion-dependent anemia due to low- or intermediate-1-risk myelodysplastic syndromes (MDS) associated with a deletion 5q cytogenetic abnormality with or without additional cytogenetic abnormalities. 1.6 Limitations of Use Lenalidomide capsules is not indicated and is not recommended for the treatment of patients with CLL outside of controlled clinical trials [see Warnings and Precautions (5.5) ] .

2 DOSAGE AND ADMINISTRATION MM combination therapy: 25 mg once daily orally on Days 1 to 21 of repeated 28-day cycles. ( 2.1 ) MM maintenance therapy following auto-HSCT: 10 mg once daily continuously on Days 1 to 28 of repeated 28-day cycles. ( 2.1 ) MDS: 10 mg once daily. ( 2.2 ) Renal impairment: Adjust starting dose based on the creatinine clearance value. ( 2.6 ) For concomitant therapy doses, see Full Prescribing Information. ( 2.1 , 14.1 ) 2.1 Recommended Dosage for Multiple Myeloma Lenalidomide Capsules Combination Therapy The recommended starting dose of lenalidomide capsules is 25 mg orally once daily on Days 1 to 21 of repeated 28-day cycles in combination with dexamethasone. Refer to Section 14.1 for specific dexamethasone dosing. For patients greater than 75 years old, the starting dose of dexamethasone may be reduced [see Clinical Studies (14.1) ] . Treatment should be continued until disease progression or unacceptable toxicity. In patients who are not eligible for auto-HSCT, treatment should continue until disease progression or unacceptable toxicity. For patients who are auto-HSCT-eligible, hematopoietic stem cell mobilization should occur within 4 cycles of a lenalidomide capsules-containing therapy [see Warnings and Precautions (5.12) ]. Dose Adjustments for Hematologic Toxicities During MM Treatment Dose modification guidelines, as summarized in Table 1 below, are recommended to manage Grade 3 or 4 neutropenia or thrombocytopenia or other Grade 3 or 4 toxicity judged to be related to lenalidomide capsules. Table 1: Dose Adjustments for Hematologic Toxicities for MM Platelet counts Thrombocytopenia in MM When Platelets Recommended Course Days 1 to 21 of repeated 28-day cycle Fall below 30,000/mcL Interrupt lenalidomide capsules treatment, follow CBC weekly Return to at least 30,000/mcL Resume lenalidomide capsules at next lower dose. Do not dose below 2.5 mg daily For each subsequent drop below 30,000/mcL Interrupt lenalidomide capsules treatment Return to at least 30,000/mcL Resume lenalidomide capsules at next lower dose. Do not dose below 2.5 mg daily Absolute Neutrophil counts (ANC) Neutropenia in MM When Neutrophils Recommended Course Days 1 to 21 of repeated 28-day cycle Fall below 1,000/mcL Interrupt lenalidomide capsules treatment, follow CBC weekly Return to at least 1,000/mcL and neutropenia is the only toxicity Resume lenalidomide capsules at 25 mg daily or initial starting dose Return to at least 1,000/mcL and if other toxicity Resume lenalidomide capsules at next lower dose. Do not dose below 2.5 mg daily For each subsequent drop below 1,000/mcL Interrupt lenalidomide capsules treatment Return to at least 1,000/mcL Resume lenalidomide capsules at next lower dose. Do not dose below 2.5 mg daily Lenalidomide Maintenance Therapy Following Auto-HSCT Following auto-HSCT, initiate lenalidomide maintenance therapy after adequate hematologic recovery (ANC at least 1,000/mcL and/or platelet counts at least 75,000/mcL). The recommended starting dose of lenalidomide capsules is 10 mg once daily continuously (Days 1 to 28 of repeated 28-day cycles) until disease progression or unacceptable toxicity. After 3 cycles of maintenance therapy, the dose can be increased to 15 mg once daily if tolerated. Dose Adjustments for Hematologic Toxicities During MM Treatment Dose modification guidelines, as summarized in Table 2 below, are recommended to manage Grade 3 or 4 neutropenia or thrombocytopenia or other Grade 3 or 4 toxicity judged to be related to lenalidomide capsules. Table 2: Dose Adjustments for Hematologic Toxicities for MM Platelet counts Thrombocytopenia in MM When Platelets Recommended Course Fall below 30,000/mcL Interrupt lenalidomide capsules treatment, follow CBC weekly Return to at least 30,000/mcL Resume lenalidomide capsules at next lower dose, continuously for Days 1 to 28 of repeated 28-day cycle If at the 5 mg daily dose, For a subsequent drop below 30,000/mcL Interrupt lenalidomide capsules treatment. Do not dose below 5 mg daily for Day 1 to 21 of 28 day cycle Return to at least 30,000/mcL Resume lenalidomide capsules at 5 mg daily for Days 1 to 21 of 28-day cycle. Do not dose below 5 mg daily for Day 1 to 21 of 28 day cycle Absolute Neutrophil counts (ANC) Neutropenia in MM When Neutrophils Recommended Course Fall below 500/mcL Interrupt lenalidomide capsules treatment, follow CBC weekly Return to at least 500/mcL Resume lenalidomide capsules at next lower dose, continuously for Days 1 to 28 of repeated 28-day cycle If at 5 mg daily dose, For a subsequent drop below 500/mcL Interrupt lenalidomide capsules treatment. Do not dose below 5 mg daily for Days 1 to 21 of 28-day cycle Return to at least 500/mcL Resume lenalidomide capsules at 5 mg daily for Days 1 to 21 of 28-day cycle. Do not dose below 5 mg daily for Days 1 to 21 of 28-day cycle 2.2 Recommended Dosage for Myelodysplastic Syndromes The recommended starting dose of lenalidomide capsules is 10 mg daily. Treatment is continued or modified based upon clinical and laboratory findings. Continue treatment until disease progression or unacceptable toxicity. Dose Adjustments for Hematologic Toxicities During MDS Treatment Patients who are dosed initially at 10 mg and who experience thrombocytopenia should have their dosage adjusted as follows: Platelet counts If thrombocytopenia develops WITHIN 4 weeks of starting treatment at 10 mg daily in MDS If baseline is at least 100,000/mcL When Platelets Recommended Course Fall below 50,000/mcL Interrupt lenalidomide capsules treatment Return to at least 50,000/mcL Resume lenalidomide capsules at 5 mg daily If baseline is below 100,000/mcL When Platelets Recommended Course Fall to 50% of the baseline value Interrupt lenalidomide capsules treatment If baseline is at least 60,000/mcL and returns to at least 50,000/mcL Resume lenalidomide capsules at 5 mg daily If baseline is below 60,000/mcL and returns to at least 30,000/mcL Resume lenalidomide capsules at 5 mg daily If thrombocytopenia develops AFTER 4 weeks of starting treatment at 10 mg daily in MDS When Platelets Recommended Course Fall below 30,000/mcL or below 50,000/mcL with platelet transfusions Interrupt lenalidomide capsules treatment Return to at least 30,000/mcL (without hemostatic failure) Resume lenalidomide capsules at 5 mg daily Patients who experience thrombocytopenia at 5 mg daily should have their dosage adjusted as follows: If thrombocytopenia develops during treatment at 5 mg daily in MDS When Platelets Recommended Course Fall below 30,000/mcL or below 50,000/mcL with platelet transfusions Interrupt lenalidomide capsules treatment Return to at least 30,000/mcL (without hemostatic failure) Resume lenalidomide capsules at 2.5 mg daily Patients who are dosed initially at 10 mg and experience neutropenia should have their dosage adjusted as follows: Absolute Neutrophil counts (ANC) If neutropenia develops WITHIN 4 weeks of starting treatment at 10 mg daily in MDS If baseline ANC is at least 1,000/mcL When Neutrophils Recommended Course Fall below 750/mcL Interrupt lenalidomide capsules treatment Return to at least 1,000/mcL Resume lenalidomide capsules at 5 mg daily If baseline ANC is below 1,000/mcL When Neutrophils Recommended Course Fall below 500/mcL Interrupt lenalidomide capsules treatment Return to at least 500/mcL Resume lenalidomide capsules at 5 mg daily If neutropenia develops AFTER 4 weeks of starting treatment at 10 mg daily in MDS When Neutrophils Recommended Course Fall below 500/mcL for at least 7 days or below 500/mcL associated with fever (at least 38.5°C) Interrupt lenalidomide capsules treatment Return to at least 500/mcL Resume lenalidomide capsules at 5 mg daily Patients who experience neutropenia at 5 mg daily should have their dosage adjusted as follows: If neutropenia develops during treatment at 5 mg daily in MDS When Neutrophils Recommended Course Fall below 500/mcL for at least 7 days or below 500/mcL associated with fever (at least 38.5°C) Interrupt lenalidomide capsules treatment Return to at least 500/mcL Resume lenalidomide capsules at 2.5 mg daily 2.5 Dosage Modifications for Non-Hematologic Adverse Reactions For non-hematologic Grade 3/4 toxicities judged to be related to lenalidomide capsules, hold treatment and restart at the physician's discretion at next lower dose level when toxicity has resolved to Grade 2 or below. Permanently discontinue lenalidomide capsules for angioedema, anaphylaxis, Grade 4 rash, skin exfoliation, bullae, or any other severe dermatologic reactions [see Warnings and Precautions (5.9 , 5.15) ] . 2.6 Recommended Dosage for Patients with Renal Impairment The recommendations for dosing patients with renal impairment are shown in the following table [see Clinical Pharmacology (12.3) ] . Table 3: Dose Adjustments for Patients with Renal Impairment Renal Function (Cockcroft-Gault) Dose in L enalidomide Capsules Combination Therapy for MM Dose in L enalidomide Capsules Maintenance Therapy Following Auto-HSCT for MM CL cr 30 to 60 mL/min 10 mg once daily 5 mg once daily CL cr below 30 mL/min (not requiring dialysis) 15 mg every other day 2.5 mg once daily CL cr below 30 mL/min (requiring dialysis) 5 mg once daily. On dialysis days, administer the dose following dialysis. 2.5 mg once daily. On dialysis days, administer the dose following dialysis. Lenalidomide Capsules Combination Therapy for MM: For CL cr of 30 to 60 mL/min, consider escalating the dose to 15 mg after 2 cycles if the patient tolerates the 10 mg dose of lenalidomide without dose-limiting toxicity. Lenalidomide Capsules Maintenance Therapy Following Auto-HSCT for MM: Base subsequent lenalidomide capsules dose increase or decrease on individual patient treatment tolerance [see Dosage and Administration (2.1) ] . 2.7 Administration Advise patients to take lenalidomide capsules orally at about the same time each day, either with or without food. Advise patients to swallow lenalidomide capsules whole with water and not to open, break, or chew them.

4 CONTRAINDICATIONS Pregnancy. (Boxed Warning, 4.1 , 5.1 , 8.1 ) Demonstrated severe hypersensitivity to lenalidomide. ( 4.2 , 5.9 , 5.15 ) 4.1 Pregnancy Lenalidomide capsules can cause fetal harm when administered to a pregnant female. Limb abnormalities were seen in the offspring of monkeys that were dosed with lenalidomide during organogenesis. This effect was seen at all doses tested. Due to the results of this developmental monkey study and lenalidomide’s structural similarities to thalidomide, a known human teratogen, lenalidomide is contraindicated in females who are pregnant [see Boxed Warning ]. If this drug is used during pregnancy or if the patient becomes pregnant while taking this drug, the patient should be apprised of the potential risk to a fetus [see Warnings and Precautions (5.1 , 5.2 ), Use in Special Populations (8.1 , 8.3) ] . 4.2 Severe Hypersensitivity Reactions Lenalidomide capsules is contraindicated in patients who have demonstrated severe hypersensitivity (e.g., angioedema, Stevens-Johnson syndrome, toxic epidermal necrolysis) to lenalidomide [see Warnings and Precautions (5.9 , 5.15) ].

5 WARNINGS AND PRECAUTIONS Increased Mortality: serious and fatal cardiac adverse reactions occurred in patients with CLL treated with lenalidomide. ( 5.5 ) Second Primary Malignancies (SPM): Higher incidences of SPM were observed in controlled trials of patients with MM receiving lenalidomide. ( 5.6 ) Increased Mortality: Observed in patients with MM when pembrolizumab was added to dexamethasone and a thalidomide analogue. ( 5.7 ) Hepatotoxicity: Hepatic failure including fatalities; monitor liver function. Stop lenalidomide and evaluate if hepatotoxicity is suspected. ( 5.8 ) Severe Cutaneous Reactions: Discontinue lenalidomide for severe reactions. ( 5.9 ) Tumor lysis syndrome (TLS) including fatalities: Monitor patients at risk of TLS (i.e., those with high tumor burden) and take appropriate precautions. ( 5.10 ) Tumor flare reaction: Serious tumor flare reactions, including fatal reactions, have occurred during investigational use of lenalidomide for chronic lymphocytic leukemia and lymphoma. ( 5.11 ) Impaired Stem Cell mobilization: A decrease in the number of CD34+ cells collected after treatment (> 4 cycles) with lenalidomide has been reported. Consider early referral to transplant center. ( 5.12 ) Hypersensitivity: Monitor patients for potential hypersensitivity. Discontinue lenalidomide for angioedema and anaphylaxis. ( 5.15 ) 5.1 Embryo-Fetal Toxicity Lenalidomide is a thalidomide analogue and is contraindicated for use during pregnancy. Thalidomide is a known human teratogen that causes life-threatening human birth defects or embryo-fetal death [see Use in Specific Populations (8.1) ]. An embryo-fetal development study in monkeys indicates that lenalidomide produced malformations in the offspring of female monkeys who received the drug during pregnancy, similar to birth defects observed in humans following exposure to thalidomide during pregnancy. Lenalidomide is only available through the Lenalidomide REMS program [see Warnings and Precautions (5.2) ] . Females of Reproductive Potential Females of reproductive potential must avoid pregnancy for at least 4 weeks before beginning lenalidomide therapy, during therapy, during dose interruptions and for at least 4 weeks after completing therapy. Females must commit either to abstain continuously from heterosexual sexual intercourse or to use two methods of reliable birth control, beginning 4 weeks prior to initiating treatment with lenalidomide, during therapy, during dose interruptions and continuing for 4 weeks following discontinuation of lenalidomide therapy. Two negative pregnancy tests must be obtained prior to initiating therapy. The first test should be performed within 10 days to 14 days and the second test within 24 hours prior to prescribing lenalidomide therapy and then weekly during the first month, then monthly thereafter in females with regular menstrual cycles or every 2 weeks in females with irregular menstrual cycles [see Use in Specific Populations (8.3) ] . Males Lenalidomide is present in the semen of patients receiving the drug. Therefore, males must always use a latex or synthetic condom during any sexual contact with females of reproductive potential while taking lenalidomide and for up to 4 weeks after discontinuing lenalidomide, even if they have undergone a successful vasectomy. Male patients taking lenalidomide must not donate sperm and for up to 4 weeks after discontinuing lenalidomide [see Use in Specific Populations (8.3) ] . Blood Donation Patients must not donate blood during treatment with lenalidomide and for 4 weeks following discontinuation of the drug because the blood might be given to a pregnant female patient whose fetus must not be exposed to lenalidomide. 5.2 Lenalidomide REMS Program Because of the embryo-fetal risk [see Warnings and Precautions (5.1) ], lenalidomide is available only through a restricted program under a Risk Evaluation and Mitigation Strategy (REMS), the Lenalidomide REMS program. Required components of the Lenalidomide REMS program include the following: Prescribers must be certified with the Lenalidomide REMS program by enrolling and complying with the REMS requirements. Patients must sign a Patient-Physician agreement form and comply with the REMS requirements. In particular, female patients of reproductive potential who are not pregnant must comply with the pregnancy testing and contraception requirements [see Use in Specific Populations (8.3) ] and males must comply with contraception requirements [see Use in Specific Populations (8.3) ] . Pharmacies must be certified with the Lenalidomide REMS program, must only dispense to patients who are authorized to receive lenalidomide and comply with REMS requirements. Further information about the Lenalidomide REMS program is available at www.lenalidomiderems.com or by telephone at 1-888-423-5436. 5.3 Hematologic Toxicity Lenalidomide can cause significant neutropenia and thrombocytopenia. Monitor patients with neutropenia for signs of infection. Advise patients to observe for bleeding or bruising, especially with use of concomitant medication that may increase risk of bleeding. Patients taking lenalidomide should have their complete blood counts assessed periodically as described below [see Dosage and Administration (2.1 , 2.2 ] . Monitor complete blood counts (CBC) in patients taking lenalidomide in combination with dexamethasone for MM every 7 days (weekly) for the first 2 cycles, on Days 1 and 15 of Cycle 3 and every 28 days (4 weeks) thereafter. A dose interruption and/or dose reduction may be required [see Dosage and Administration (2.1) ] . In trials for another indication, Grade 3 or 4 neutropenia was reported in up to 59% of lenalidomide-treated patients and Grade 3 or 4 thrombocytopenia in up to 38% of lenalidomide-treated patients [see Adverse Reactions (6.1) ] . Monitor complete blood counts (CBC) in patients taking lenalidomide for MDS weekly for the first 8 weeks and at least monthly thereafter. Grade 3 or 4 hematologic toxicity was seen in 80% of patients enrolled in the MDS study. In the 48% of patients who developed Grade 3 or 4 neutropenia, the median time to onset was 42 days (range, 14 days to 411 days) and the median time to documented recovery was 17 days (range, 2 days to 170 days). In the 54% of patients who developed Grade 3 or 4 thrombocytopenia, the median time to onset was 28 days (range, 8 days to 290 days) and the median time to documented recovery was 22 days (range, 5 days to 224 days) [see Boxed Warning and Dosage and Administration (2.2) ] . 5.4 Venous and Arterial Thromboembolism Venous thromboembolic events (VTE [DVT and PE]) and arterial thromboembolic events (ATE, myocardial infarction and stroke) are increased in patients treated with lenalidomide. A significantly increased risk of DVT (7.4%) and of PE (3.7%) occurred in patients with MM after at least one prior therapy who were treated with lenalidomide and dexamethasone therapy compared to patients treated in the placebo and dexamethasone group (3.1% and 0.9%) in clinical trials with varying use of anticoagulant therapies. In the newly diagnosed multiple myeloma (NDMM) study in which nearly all patients received antithrombotic prophylaxis, DVT was reported as a serious adverse reaction (3.6%, 2.0% and 1.7%) in the Rd Continuous, Rd18 and MPT Arms, respectively. The frequency of serious adverse reactions of PE was similar between the Rd Continuous, Rd18 and MPT Arms (3.8%, 2.8% and 3.7%, respectively) [see Boxed Warning and Adverse Reactions (6.1) ] . Myocardial infarction (1.7%) and stroke (CVA) (2.3%) are increased in patients with MM after at least one prior therapy who were treated with lenalidomide and dexamethasone therapy compared to patients treated with placebo and dexamethasone (0.6% and 0.9%) in clinical trials. In the NDMM study, myocardial infarction (including acute) was reported as a serious adverse reaction (2.3%, 0.6% and 1.1%) in the Rd Continuous, Rd18 and MPT Arms, respectively. The frequency of serious adverse reactions of CVA was similar between the Rd Continuous, Rd18 and MPT Arms (0.8%, 0.6 % and 0.6%, respectively) [see Adverse Reactions (6.1) ]. Patients with known risk factors, including prior thrombosis, may be at greater risk and actions should be taken to try to minimize all modifiable factors (e.g. hyperlipidemia, hypertension, smoking). In controlled clinical trials that did not use concomitant thromboprophylaxis, 21.5% overall thrombotic events (Standardized MedDRA Query Embolic and Thrombotic events) occurred in patients with refractory and relapsed MM who were treated with lenalidomide and dexamethasone compared to 8.3% thrombosis in patients treated with placebo and dexamethasone. The median time to first thrombosis event was 2.8 months. In the NDMM study in which nearly all patients received antithrombotic prophylaxis, the overall frequency of thrombotic events was 17.4% in patients in the combined Rd Continuous and Rd18 Arms and was 11.6% in the MPT Arm. The median time to first thrombosis event was 4.3 months in the combined Rd Continuous and Rd18 Arms. Thromboprophylaxis is recommended. The regimen of thromboprophylaxis should be based on an assessment of the patient’s underlying risks. Instruct patients to report immediately any signs and symptoms suggestive of thrombotic events. ESAs and estrogens may further increase the risk of thrombosis and their use should be based on a benefit-risk decision in patients receiving lenalidomide [see Drug Interactions (7.2) ]. 5.5 Increased Mortality in Patients with CLL In a prospective randomized (1:1) clinical trial in the first line treatment of patients with chronic lymphocytic leukemia, single agent lenalidomide therapy increased the risk of death as compared to single agent chlorambucil. In an interim analysis, there were 34 deaths among 210 patients on the lenalidomide treatment arm compared to 18 deaths among 211 patients in the chlorambucil treatment arm, and hazard ratio for overall survival was 1.92 [95% CI: 1.08 to 3.41], consistent with a 92% increase in the risk of death. The trial was halted for safety in July 2013. Serious adverse cardiovascular reactions, including atrial fibrillation, myocardial infarction and cardiac failure occurred more frequently in the lenalidomide treatment arm. Lenalidomide is not indicated and not recommended for use in CLL outside of controlled clinical trials. 5.6 Second Primary Malignancies In clinical trials in patients with MM receiving lenalidomide, an increase of hematologic plus solid tumor second primary malignancies (SPM) notably AML and MDS have been observed. An increase in hematologic SPM including AML and MDS occurred in 5.3% of patients with NDMM receiving lenalidomide in combination with oral melphalan compared with 1.3% of patients receiving melphalan without lenalidomide. The frequency of AML and MDS cases in patients with NDMM treated with lenalidomide in combination with dexamethasone without melphalan was 0.4%. In patients receiving lenalidomide maintenance therapy following high dose intravenous melphalan and auto-HSCT, hematologic SPM occurred in 7.5% of patients compared to 3.3% in patients receiving placebo. The incidence of hematologic plus solid tumor (excluding squamous cell carcinoma and basal cell carcinoma) SPM was 14.9%, compared to 8.8% in patients receiving placebo with a median follow-up of 91.5 months. Non-melanoma skin cancer SPM, including squamous cell carcinoma and basal cell carcinoma, occurred in 3.9% of patients receiving lenalidomide maintenance, compared to 2.6% in the placebo arm. In patients with relapsed or refractory MM treated with lenalidomide/dexamethasone, the incidence of hematologic plus solid tumor (excluding squamous cell carcinoma and basal cell carcinoma) SPM was 2.3% versus 0.6% in the dexamethasone alone arm. Non-melanoma skin cancer SPM, including squamous cell carcinoma and basal cell carcinoma, occurred in 3.1% of patients receiving lenalidomide/dexamethasone, compared to 0.6% in the dexamethasone alone arm. Patients who received lenalidomide-containing therapy until disease progression did not show a higher incidence of invasive SPM than patients treated in the fixed duration lenalidomide-containing arms. Monitor patients for the development of second primary malignancies. Take into account both the potential benefit of lenalidomide and the risk of second primary malignancies when considering treatment with lenalidomide. 5.7 Increased Mortality in Patients with MM When Pembrolizumab Is Added to a Thalidomide Analogue and Dexamethasone In two randomized clinical trials in patients with MM, the addition of pembrolizumab to a thalidomide analogue plus dexamethasone, a use for which no PD-1 or PD-L1 blocking antibody is indicated, resulted in increased mortality. Treatment of patients with MM with a PD-1 or PD-L1 blocking antibody in combination with a thalidomide analogue plus dexamethasone is not recommended outside of controlled clinical trials. 5.8 Hepatotoxicity Hepatic failure, including fatal cases, has occurred in patients treated with lenalidomide in combination with dexamethasone. In clinical trials, 15% of patients experienced hepatotoxicity (with hepatocellular, cholestatic and mixed characteristics); 2% of patients with MM and 1% of patients with myelodysplasia had serious hepatotoxicity events. The mechanism of drug-induced hepatotoxicity is unknown. Pre-existing viral liver disease, elevated baseline liver enzymes and concomitant medications may be risk factors. Monitor liver enzymes periodically. Stop lenalidomide upon elevation of liver enzymes. After return to baseline values, treatment at a lower dose may be considered. 5.9 Severe Cutaneous Reactions Severe cutaneous reactions including Stevens-Johnson syndrome (SJS), toxic epidermal necrolysis (TEN) and drug reaction with eosinophilia and systemic symptoms (DRESS) have been reported. DRESS may present with a cutaneous reaction (such as rash or exfoliative dermatitis), eosinophilia, fever and/or lymphadenopathy with systemic complications such as hepatitis, nephritis, pneumonitis, myocarditis and/or pericarditis. These events can be fatal. Patients with a prior history of Grade 4 rash associated with thalidomide treatment should not receive lenalidomide. Consider lenalidomide interruption or discontinuation for Grade 2 to 3 skin rash. Permanently discontinue lenalidomide for Grade 4 rash, exfoliative or bullous rash, or for other severe cutaneous reactions such as SJS, TEN or DRESS [see Dosage and Administration (2.5) ] . 5.10 Tumor Lysis Syndrome Fatal instances of tumor lysis syndrome (TLS) have been reported during treatment with lenalidomide. The patients at risk of TLS are those with high tumor burden prior to treatment. Monitor patients at risk closely and take appropriate preventive approaches. 5.11 Tumor Flare Reaction Tumor flare reaction (TFR), including fatal reactions, have occurred during investigational use of lenalidomide for CLL and lymphoma and is characterized by tender lymph node swelling, low grade fever, pain and rash. Lenalidomide is not indicated and not recommended for use in CLL outside of controlled clinical trials. Tumor flare reaction may mimic progression of disease (PD). Lenalidomide may be continued in patients with Grade 1 and 2 TFR without interruption or modification, at the physician’s discretion. Patients with Grade 1 and 2 TFR may also be treated with corticosteroids, non-steroidal anti-inflammatory drugs (NSAIDs) and/or narcotic analgesics for management of TFR symptoms. In patients with Grade 3 or 4 TFR, it is recommended to withhold treatment with lenalidomide until TFR resolves to ≤ Grade 1. Patients with Grade 3 or 4 TFR may be treated for management of symptoms per the guidance for treatment of Grade 1 and 2 TFR. 5.12 Impaired Stem Cell Mobilization A decrease in the number of CD34+ cells collected after treatment (> 4 cycles) with lenalidomide has been reported. In patients who are auto-HSCT candidates, referral to a transplant center should occur early in treatment to optimize the timing of the stem cell collection. In patients who received more than 4 cycles of a lenalidomide-containing treatment or for whom inadequate numbers of CD 34+ cells have been collected with G-CSF alone, G-CSF with cyclophosphamide or the combination of G-CSF with a CXCR4 inhibitor may be considered. 5.13 Thyroid Disorders Both hypothyroidism and hyperthyroidism have been reported [see Adverse Reactions (6.2) ] . Measure thyroid function before start of lenalidomide treatment and during therapy. 5.15 Hypersensitivity Hypersensitivity, including angioedema, anaphylaxis and anaphylactic reactions to lenalidomide has been reported. Permanently discontinue lenalidomide for angioedema and anaphylaxis [see Dosage and Administration (2.2) ] .

7 DRUG INTERACTIONS Digoxin: Monitor digoxin plasma levels periodically due to increased C max and AUC with concomitant lenalidomide therapy. ( 7.1 ) Concomitant use of erythropoietin stimulating agents or estrogen containing therapies with lenalidomide may increase the risk of thrombosis. ( 7.2 ) 7.1 Digoxin When digoxin was co-administered with multiple doses of lenalidomide (10 mg/day) the digoxin C max and AUC inf were increased by 14%. Periodically monitor digoxin plasma levels, in accordance with clinical judgment and based on standard clinical practice in patients receiving this medication, during administration of lenalidomide. 7.2 Concomitant Therapies That May Increase the Risk of Thrombosis Erythropoietic agents, or other agents that may increase the risk of thrombosis, such as estrogen containing therapies, should be used with caution after making a benefit-risk assessment in patients receiving lenalidomide [see Warnings and Precautions (5.4) ] . 7.3 Warfarin Co-administration of multiple doses of lenalidomide (10 mg/day) with a single-dose of warfarin (25 mg) had no effect on the pharmacokinetics of lenalidomide or R- and S-warfarin. Expected changes in laboratory assessments of PT and INR were observed after warfarin administration, but these changes were not affected by concomitant lenalidomide administration. It is not known whether there is an interaction between dexamethasone and warfarin. Close monitoring of PT and INR is recommended in patients with MM taking concomitant warfarin.

6 ADVERSE REACTIONS The following clinically significant adverse reactions are described in detail in other sections of the prescribing information: Embryo-Fetal Toxicity [see Boxed Warning , Warnings and Precautions (5.1 , 5.2) ] Hematologic Toxicity [see Boxed Warning , Warnings and Precautions (5.3) ] Venous and Arterial Thromboembolism [see Boxed Warning , Warnings and Precautions (5.4) ] Increased Mortality in Patients with CLL [see Warnings and Precautions (5.5) ] Second Primary Malignancies [see Warnings and Precautions (5.6) ] Increased Mortality in Patients with MM When Pembrolizumab Is Added to a Thalidomide Analogue and Dexamethasone [see Warnings and Precautions (5.7) ] Hepatotoxicity [see Warnings and Precautions (5.8) ] Severe Cutaneous Reactions [see Warnings and Precautions (5.9) ] Tumor Lysis Syndrome [see Warnings and Precautions (5.10) ] Tumor Flare Reactions [see Warnings and Precautions (5.11) ] Impaired Stem Cell Mobilization [see Warnings and Precautions (5.12) ] Thyroid Disorders [see Warnings and Precautions (5.13) ] Hypersensitivity [see Warnings and Precautions (5.15) ] MM: Most common adverse reactions (≥ 20%) include diarrhea, fatigue, anemia, constipation, neutropenia, leukopenia, peripheral edema, insomnia, muscle cramp/spasms, abdominal pain, back pain, nausea, asthenia, pyrexia, upper respiratory tract infection, bronchitis, nasopharyngitis, gastroenteritis, cough, rash, dyspnea, dizziness, decreased appetite, thrombocytopenia and tremor. ( 6.1 ) MDS: Most common adverse reactions (> 15%) include thrombocytopenia, neutropenia, diarrhea, pruritus, rash, fatigue, constipation, nausea, nasopharyngitis, arthralgia, pyrexia, back pain, peripheral edema, cough, dizziness, headache, muscle cramp, dyspnea, pharyngitis and epistaxis. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Amneal Pharmaceuticals LLC at 1-877-835-5472 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. 6.1 Clinical Trials Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice. Newly Diagnosed MM – Lenalidomide Combination Therapy: Data were evaluated from 1,613 patients in a large phase 3 study who received at least one dose of lenalidomide with low dose dexamethasone (Rd) given for 2 different durations of time (i.e., until progressive disease [Arm Rd Continuous; N=532] or for up to eighteen 28-day cycles [72 weeks, Arm Rd18; N=540] or who received melphalan, prednisone and thalidomide (Arm MPT; N=541) for a maximum of twelve 42-day cycles (72 weeks). The median treatment duration in the Rd Continuous arm was 80.2 weeks (range 0.7 to 246.7) or 18.4 months (range 0.16 to 56.7). In general, the most frequently reported adverse reactions were comparable in Arm Rd Continuous and Arm Rd18 and included diarrhea, anemia, constipation, peripheral edema, neutropenia, fatigue, back pain, nausea, asthenia and insomnia. The most frequently reported Grade 3 or 4 reactions included neutropenia, anemia, thrombocytopenia, pneumonia, asthenia, fatigue, back pain, hypokalemia, rash, cataract, lymphopenia, dyspnea, DVT, hyperglycemia and leukopenia. The highest frequency of infections occurred in Arm Rd Continuous (75%) compared to Arm MPT (56%). There were more grade 3 and 4 and serious adverse reactions of infection in Arm Rd Continuous than either Arm MPT or Rd18. In the Rd Continuous arm, the most common adverse reactions leading to dose interruption of lenalidomide were infection events (28.8%); overall, the median time to the first dose interruption of lenalidomide was 7 weeks. The most common adverse reactions leading to dose reduction of lenalidomide in the Rd Continuous arm were hematologic events (10.7%); overall, the median time to the first dose reduction of lenalidomide was 16 weeks. In the Rd Continuous arm, the most common adverse reactions leading to discontinuation of lenalidomide were infection events (3.4%). In both Rd arms, the frequencies of onset of adverse reactions were generally highest in the first 6 months of treatment and then the frequencies decreased over time or remained stable throughout treatment, except for cataracts. The frequency of onset of cataracts increased over time with 0.7% during the first 6 months and up to 9.6% by the 2nd year of treatment with Rd Continuous. Table 4 summarizes the adverse reactions reported for the Rd Continuous, Rd18 and MPT treatment arms. Table 4: All Adverse Reactions in ≥ 5% and Grade 3/4 Adverse Reactions in ≥ 1% of Patients with MM in the Rd Continuous or Rd18 Arms * Body System Adverse Reaction All Adverse Reactions a Grade 3/4 Adverse Reactions b Rd Continuous (N = 532) Rd18 (N = 540) MPT (N = 541) Rd Continuous (N = 532) Rd18 (N = 540) MPT (N = 541) General disorders and administration site conditions Fatigue % 173 (33) 177 (33) 154 (28) 39 (7) 46 (9) 31 (6) Asthenia 150 (28) 123 (23) 124 (23) 41 (8) 33 (6) 32 (6) Pyrexia c 114 (21) 102 (19) 76 (14) 13 (2) 7 (1) 7 (1) Non-cardiac chest pain f 29 (5) 31 (6) 18 (3) < 1% < 1% < 1% Gastrointestinal disorders Diarrhea 242 (45) 208 (39) 89 (16) 21 (4) 18 (3) 8 (1) Abdominal pain % f 109 (20) 78 (14) 60 (11) 7 (1) 9 (2) < 1% Dyspepsia f 57 (11) 28 (5) 36 (7) < 1% < 1% 0 (0) Musculoskeletal and connective tissue disorders Back pain c 170 (32) 145 (27) 116 (21) 37 (7) 34 (6) 28 (5) Muscle spasms f 109 (20) 102 (19) 61 (11) < 1% < 1% < 1% Arthralgia f 101 (19) 71 (13) 66 (12) 9 (2) 8 (1) 8 (1) Bone pain f 87 (16) 77 (14) 62 (11) 16 (3) 15 (3) 14 (3) Pain in extremity f 79 (15) 66 (12) 61 (11) 8 (2) 8 (1) 7 (1) Musculoskeletal pain f 67 (13) 59 (11) 36 (7) < 1% < 1% < 1% Musculoskeletal chest pain f 60 (11) 51 (9) 39 (7) 6 (1) < 1% < 1% Muscular weakness f 43 (8) 35 (6) 29 (5) < 1% 8 (1) < 1% Neck pain f 40 (8) 19 (4) 10 (2) < 1% < 1% < 1% Infections and infestations Bronchitis c 90 (17) 59 (11) 43 (8) 9 (2) 6 (1) < 1% Nasopharyngitis f 80 (15) 54 (10) 33 (6) 0 (0) 0 (0) 0 (0) Urinary tract infection f 76 (14) 63 (12) 41 (8) 8 (2) 8 (1) < 1% Upper respiratory tract infection c%f 69 (13) 53 (10) 31 (6) < 1% 8 (1) < 1% Pneumonia c@ 93 (17) 87 (16) 56 (10) 60 (11) 57 (11) 41 (8) Respiratory tract infection % 35 (7) 25 (5) 21 (4) 7 (1) < 1% < 1% Influenza f 33 (6) 23 (4) 15 (3) < 1% < 1% 0 (0) Gastroenteritis f 32 (6) 17 (3) 13 (2) 0 ( 0) < 1% < 1% Lower respiratory tract infection 29 (5) 14 (3) 16 (3) 10 (2) < 1% < 1% Rhinitis f 29 (5) 24 (4) 14 (3) 0 (0) 0 (0) 0 (0) Cellulitis c < 5% < 5% < 5% 8 (2) < 1% < 1% Sepsis c@ 33 (6) 26 (5) 18 (3) 26 (5) 20 (4) 13 (2) Nervous system disorders Headache f 75 (14) 52 (10) 56 (10) < 1% < 1% < 1% Dysgeusia f 39 (7) 45 (8) 22 (4) < 1% 0 (0.0) < 1% Blood and lymphatic system disorders d Anemia 233 (44) 193 (36) 229 (42) 97 (18) 85 (16) 102 (19) Neutropenia 186 (35) 178 (33) 328 (61) 148 (28) 143 (26) 243 (45) Thrombocytopenia 104 (20) 100 (19) 135 (25) 44 (8) 43 (8) 60 (11) Febrile neutropenia 7 (1) 17 (3) 15 (3) 6 (1) 16 (3) 14 (3) Pancytopenia < 1% 6 (1) 7 (1) < 1% < 1% < 1% Respiratory, thoracic and mediastinal disorders Cough f 121 (23) 94 (17) 68 (13) < 1% < 1% < 1% Dyspnea c,e 117 (22) 89 (16) 113 (21) 30 (6) 22 (4) 18 (3) Epistaxis f 32 (6) 31 (6) 17 (3) < 1% < 1% 0 (0) Oropharyngeal pain f 30 (6) 22 (4) 14 (3) 0 (0) 0 (0) 0 (0) Dyspnea exertional e 27 (5) 29 (5) < 5% 6 (1) < 1% 0 (0) Metabolism and nutrition disorders Decreased appetite 123 (23) 115 (21) 72 (13) 14 (3) 7 (1) < 1% Hypokalemia % 91 (17) 62 (11) 38 (7) 35 (7) 20 (4) 11 (2) Hyperglycemia 62 (12) 52 (10) 19 (4) 28 (5) 23 (4) 9 (2) Hypocalcemia 57 (11) 56 (10) 31 (6) 23 (4) 19 (4) 8 (1) Dehydration % 25 (5) 29 (5) 17 (3) 8 (2) 13 (2) 9 (2) Gout e < 5% < 5% < 5% 8 (2) 0 (0) 0 (0) Diabetes mellitus % e < 5% < 5% < 5% 8 (2) < 1% < 1% Hypophosphatemia e < 5% < 5% < 5% 7 (1) < 1% < 1% Hyponatremia % e < 5% < 5% < 5% 7 (1) 13 (2) 6 (1) Skin and subcutaneous tissue disorders Rash 139 (26) 151 (28) 105 (19) 39 (7) 38 (7) 33 (6) Pruritus f 47 (9) 49 (9) 24 (4) < 1% < 1% < 1% Psychiatric disorders Insomnia 147 (28) 127 (24) 53 (10) < 1% 6 (1) 0 (0) Depression 58 (11) 46 (9) 30 (6) 10 (2) < 1% < 1% Vascular disorders Deep vein thrombosis c% 55 (10) 39 (7) 22 (4) 30 (6) 20 (4) 15 (3) Hypotension c% 51 (10) 35 (6) 36 (7) 11 (2) 8 (1) 6 (1) Injury, Poisoning, and Procedural Complications Fall f 43 (8) 25 (5) 25 (5) < 1% 6 (1) 6 (1) Contusion f 33 (6) 24 (4) 15 (3) < 1% < 1% 0 (0) Eye disorders Cataract 73 (14) 31 (6) < 1% 31 (6) 14 (3) < 1% Cataract subcapsular e < 5% < 5% < 5% 7 (1) 0 (0) 0 (0) Investigations Weight decreased 72 (14) 78 (14) 48 (9) 11 (2) < 1% < 1% Cardiac disorders Atrial fibrillation c 37 (7) 25 (5) 25 (5) 13 (2) 9 (2) 6 (1) Myocardial infarction (including acute) c ,e < 5% < 5% < 5% 10 (2) < 1% < 1% Renal and Urinary disorders Renal failure (including acute) c@,f 49 (9) 54 (10) 37 (7) 28 (5) 33 (6) 29 (5) Neoplasms benign, malignant and unspecified (Including cysts and polyps) Squamous cell carcinoma c e < 5% < 5% < 5% 8 (2) < 1% 0 (0) Basal cell carcinoma c e,f < 5% < 5% < 5% < 1% < 1% 0 (0) Note: A subject with multiple occurrences of an adverse reaction is counted only once under the applicable Body System/Adverse Reaction. a All treatment-emergent adverse events in at least 5% of subjects in the Rd Continuous or Rd18 Arms and at least a 2% higher frequency (%) in either the Rd Continuous or Rd18 Arms compared to the MPT Arm. b All grade 3 or 4 treatment-emergent adverse events in at least 1% of subjects in the Rd Continuous or Rd18 Arms and at least a 1% higher frequency (%) in either the Rd Continuous or Rd18 Arms compared to the MPT Arm. c Serious treatment-emergent adverse events in at least 1% of subjects in the Rd Continuous or Rd18 Arms and at least a 1% higher frequency (%) in either the Rd Continuous or Rd18 Arms compared to the MPT Arm. d Preferred terms for the blood and lymphatic system disorders body system were included by medical judgment as known adverse reactions for Rd Continuous/Rd18, and have also been reported as serious. e Footnote “a” not applicable. f Footnote “b” not applicable. @ - adverse reactions in which at least one resulted in a fatal outcome. % - adverse reactions in which at least one was considered to be life threatening (if the outcome of the reaction was death, it is included with death cases). * Adverse reactions included in combined adverse reaction terms: Abdominal Pain : Abdominal pain, abdominal pain upper, abdominal pain lower, gastrointestinal pain Pneumonias : Pneumonia, lobar pneumonia, pneumonia pneumococcal, bronchopneumonia, pneumocystis jiroveci pneumonia, pneumonia legionella, pneumonia staphylococcal, pneumonia klebsiella, atypical pneumonia, pneumonia bacterial, pneumonia escherichia, pneumonia streptococcal, pneumonia viral Sepsis : Sepsis, septic shock, urosepsis, escherichia sepsis, neutropenic sepsis, pneumococcal sepsis, staphylococcal sepsis, bacterial sepsis, meningococcal sepsis, enterococcal sepsis, klebsiella sepsis, pseudomonal sepsis Rash : Rash, rash pruritic, rash erythematous, rash maculo-papular, rash generalized, rash papular, exfoliative rash, rash follicular, rash macular, drug rash with eosinophilia and systemic symptoms, erythema multiforme, rash pustular Deep Vein Thrombosis : Deep vein thrombosis, venous thrombosis limb, venous thrombosis Newly Diagnosed MM - Lenalidomide Maintenance Therapy Following Auto-HSCT: Data were evaluated from 1,018 patients in two randomized trials who received at least one dose of lenalidomide 10 mg daily as maintenance therapy after auto-HSCT until progressive disease or unacceptable toxicity. The mean treatment duration for lenalidomide treatment was 30.3 months for Maintenance Study 1 and 24 months for Maintenance Study 2 (overall range across both studies from 0.1 to 108 months). As of the cut-off date of 1 Mar 2015, 48 patients (21%) in the Maintenance Study 1 lenalidomide arm were still on treatment and none of the patients in the Maintenance Study 2 lenalidomide arm were still on treatment at the same cut-off date. The adverse reactions listed from Maintenance Study 1 included events reported post-transplant (completion of high-dose melphalan/auto-HSCT) and the maintenance treatment period. In Maintenance Study 2, the adverse reactions were from the maintenance treatment period only. In general, the most frequently reported adverse reactions (more than 20% in the lenalidomide arm) across both studies were neutropenia, thrombocytopenia, leukopenia, anemia, upper respiratory tract infection, bronchitis, nasopharyngitis, cough, gastroenteritis, diarrhea, rash, fatigue, asthenia, muscle spasm and pyrexia. The most frequently reported Grade 3 or 4 reactions (more than 20% in the lenalidomide arm) included neutropenia, thrombocytopenia and leukopenia. The serious adverse reactions lung infection and neutropenia (more than 4.5%) occurred in the lenalidomide arm. For lenalidomide, the most common adverse reactions leading to dose interruption were hematologic events (29.7%, data available in Maintenance Study 2 only). The most common adverse reaction leading to dose reduction of lenalidomide were hematologic events (17.7%, data available in Maintenance Study 2 only). The most common adverse reactions leading to discontinuation of lenalidomide were thrombocytopenia (2.7%) in Maintenance Study 1 and neutropenia (2.4%) in Maintenance Study 2. The frequencies of onset of adverse reactions were generally highest in the first 6 months of treatment and then the frequencies decreased over time or remained stable throughout treatment. Table 5 summarizes the adverse reactions reported for the lenalidomide and placebo maintenance treatment arms. Table 5: All Adverse Reactions in ≥ 5% and Grade 3/4 Adverse Reactions in ≥ 1% of Patients with MM in the Lenalidomide Vs Placebo Arms * Body System Adverse Reaction Maintenance Study 1 Maintenance Study 2 All Adverse Reactions a Grade 3/4 Adverse Reactions b All Adverse Reactions a Grade 3/4 Adverse Reactions b Lenalidomide (N=224) n (%) Placebo (N=221) n (%) Lenalidomide (N=224) n (%) Placebo (N=221) n (%) Lenalidomide (N=293) n (%) Placebo (N=280) n (%) Lenalidomide (N=293) n (%) Placebo (N=280) n (%) Blood and lymphatic system disorders Neutropenia c % 177 (79) 94 (43) 133 (59) 73 (33) 178 (61) 33 (12) 158 (54) 21 (8) Thrombocytopenia c % 162 (72) 101 (46) 84 (38) 67 (30) 69 (24) 29 (10) 38 (13) 8 (3) Leukopenia c 51 (23) 25 (11) 45 (20) 22 (10) 93 (32) 21 (8) 71 (24) 5 (2) Anemia 47 (21) 27 (12) 23 (10) 18 (8) 26 (9) 15 (5) 11 (4) 3 (1) Lymphopenia 40 (18) 29 (13) 37 (17) 26 (12) 13 (4) 3 (1) 11 (4) < 1% Pancytopenia c d % < 1% 0 (0) 0 (0) 0 (0) 12 (4) < 1% 7 (2) < 1% Febrile neutropenia c 39 (17) 34 (15) 39 (17) 34 (15) 7 (2) < 1% 5 (2) < 1% Infections and infestations # Upper respiratory tract infection e 60 (27) 35 (16) 7 (3) 9 (4) 32 (11) 18 (6) < 1% 0 (0) Neutropenic infection 40 (18) 19 (9) 27 (12) 14 (6) 0 (0) 0 (0) 0 (0) 0 (0) Pneumonias * c % 31 (14) 15 (7) 23 (10) 7 (3) 50 (17) 13 (5) 27 (9) 5 (2) Bronchitis c 10 (4) 9 (4) < 1% 5 (2) 139 (47) 104 (37) 4 (1) < 1% Nasopharyngitis e 5 (2) < 1% 0 (0) 0 (0) 102 (35) 84 (30) < 1% 0 (0) Gastroenteritis c 0 (0) 0 (0) 0 (0) 0 (0) 66 (23) 55 (20) 6 (2) 0 (0) Rhinitis e < 1% 0 (0) 0 (0) 0 (0) 44 (15) 19 (7) 0 (0) 0 (0) Sinusitis e 8 (4) 3 (1) 0 (0) 0 (0) 41 (14) 26 (9) 0 (0) < 1% Influenza c 8 (4) 5 (2) < 1% <1% 39 (13) 19 (7) 3 (1) 0 (0) Lung infection c 21 (9) < 1% 19 (8) < 1% 9 (3) 4 (1) < 1% 0 (0) Lower respiratory tract infection e 13 (6) 5 (2) 6 (3) 4 (2) 4 (1) 4 (1) 0 (0) < 1% Infection c 12 (5) 6 (3) 9 (4) 5 (2) 17 (6) 5 (2) 0 (0) 0 (0) Urinary tract infection c d e 9 (4) 5 (2) 4 (2) 4 (2) 22 (8) 17 (6) < 1% 0 (0) Lower respiratory tract infection bacterial d 6 (3) < 1% 4 (2) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) Bacteremia d 5 (2) 0 (0) 4 (2) 0 (0) 0 (0) 0 (0) 0 (0) 0 (0) Herpes zoster c d 11 (5) 10 (5) 3 (1) < 1% 29 (10) 25 (9) 6 (2) < 1% Sepsis * c d @ < 1% < 1% 0 (0) 0 (0) 6 (2) < 1% 4 (1) < 1% Gastrointestinal disorders Diarrhea 122 (54) 83 (38) 22 (10) 17 (8) 114 (39) 34 (12) 7 ( 2) 0 (0) Nausea e 33 (15) 22 (10) 16 (7) 10 (5) 31 (11) 28 (10) 0 ( 0) 0 (0) Vomiting 17 (8) 12 (5) 8 (4) 5 (2) 16 (5) 15 (5) < 1% 0 (0) Constipation e 12 (5) 8 (4) 0 (0) 0 (0) 37 (13) 25 (9) < 1% 0 (0) Abdominal pain e 8 (4) 7 (3) < 1% 4 (2) 31 (11) 15 (5) < 1% < 1% Abdominal pain upper e 0 (0) 0 (0) 0 (0) 0 (0) 20 (7) 12 (4) < 1% 0 (0) General disorders and administration site conditions Asthenia 0 (0) < 1% 0 (0) 0 (0) 87 (30) 53 (19) 10 (3) < 1% Fatigue 51 (23) 30 (14) 21 (9) 9 (4) 31 (11) 15 (5) 3 (1) 0 (0) Pyrexia e 17 (8) 10 (5) < 1% < 1% 60 (20) 26 (9) < 1% 0 (0) Skin and subcutaneous tissue disorders Dry skin e 9 (4) 4 (2) 0 (0) 0 (0) 31 (11) 21 (8) 0 (0) 0 (0) Rash 71 (32) 48 (22) 11 (5) 5 (2) 22 (8) 17 (6) 3 (1) 0 (0) Pruritus 9 (4) 4 (2) 3 (1) 0 (0) 21 (7) 25 (9) < 1% 0 (0) Nervous system disorders Paresthesia e < 1% 0 (0) 0 (0) 0 (0) 39 (13) 30 (11) < 1% 0 (0) Peripheral neuropathy * e 34 (15) 30 (14) 8 (4) 8 (4) 29 (10) 15 (5) 4 (1) < 1% Headache d 11 (5) 8 (4) 5 (2) < 1% 25 (9) 21 (8) 0 (0) 0 (0) Investigations Alanine aminotransferase increased 16 (7) 3 (1) 8 (4) 0 (0) 5 (2) 5 (2) 0 (0) < 1% Aspartate aminotransferase increased d 13 (6) 5 (2) 6 (3) 0 (0) < 1% 5 (2) 0 (0) 0 (0) Metabolism and nutrition disorders Hypokalemia 24 (11) 13 (6) 16 (7) 12 (5) 12 (4) < 1% < 1% 0 (0) Dehydration 9 (4 ) 5 (2) 7 (3) 3 (1) 0 (0) 0 (0) 0 (0) 0 (0) Hypophosphatemia d 16 (7) 15 (7) 13 (6) 14 (6) 0 (0) < 1% 0 (0) 0 (0) Musculoskeletal and connective tissue disorders Muscle spasms e 0 (0) < 1% 0 (0) 0 (0) 98 (33) 43 (15) < 1% 0 (0) Myalgia e 7 (3) 8 (4) 3 (1) 5 (2) 19 (6) 12 (4) < 1% < 1% Musculoskeletal pain e < 1% < 1% 0 (0) 0 (0) 19 (6) 11 (44) 0 (0) 0 (0) Hepatobiliary disorders Hyperbilirubinemia e 34 (15) 19 (9) 4 (2) < 1% 4 (1) < 1% < 1% 0 (0) Respiratory, thoracic and mediastinal disorders Cough e 23 (10) 12 (5) 3 (1) < 1% 80 (27) 56 (20) 0 (0) 0 (0) Dyspnea c e 15 (7) 9 (4) 8 (4) 4 (2) 17 (6) 9 (3) < 1% 0 (0) Rhinorrhea e 0 (0) 3 (1) 0 (0) 0 (0) 15 (5) 6 (2) 0 (0) 0 (0) Pulmonary embolism c d e 0 (0) 0 (0) 0 (0) 0 (0) 3 (1) 0 (0) < 1% 0 (0) Vascular disorders Deep vein thrombosis *c d % 8 (4) < 1% 5 (2) < 1% 7 (2) < 1% 4 (1) < 1% Neoplasms benign, malignant and unspecified (including cysts and polyps) Myelodysplastic syndrome c d e 5 (2) 0 (0) < 1% 0 (0) 3 (1) 0 (0) < 1% 0 (0) Note : Adverse Events (AEs) are coded to Body System /Adverse Reaction using MedDRA v15.1. A subject with multiple occurrences of an adverse reaction is counted only once under the applicable Body System/Adverse Reaction. a All treatment-emergent AEs in at least 5% of patients in the lenalidomide Maintenance group and at least 2% higher frequency (%) than the Placebo Maintenance group. b All grade 3 or 4 treatment-emergent AEs in at least 1% of patients in the lenalidomide Maintenance group and at least 1% higher frequency (%) than the Placebo Maintenance group. c All serious treatment-emergent AEs in at least 1% of patients in the lenalidomide Maintenance group and at least 1% higher frequency (%) than the Placebo Maintenance group. d Footnote “a” not applicable for either study e Footnote “b” not applicable for either study @ - ADRs where at least one resulted in a fatal outcome % - ADRs where at least one was considered to be Life Threatening (if the outcome of the event was death, it is included with death cases) # - All adverse reactions under Body System of Infections and Infestation except for rare infections of Public Health interest will be considered listed * Adverse Reactions for combined ADR terms (based on relevant TEAE PTs included in Maintenance Studies 1 and 2 [per MedDRA v 15.1]): Pneumonias Bronchopneumonia, Lobar pneumonia, Pneumocystis jiroveci pneumonia, Pneumonia, Pneumonia klebsiella, Pneumonia legionella, Pneumonia mycoplasmal, Pneumonia pneumococcal, Pneumonia streptococcal, Pneumonia viral, Lung disorder, Pneumonitis Sepsis : Bacterial sepsis, Pneumococcal sepsis, Sepsis, Septic shock, Staphylococcal sepsis Peripheral neuropathy : Neuropathy peripheral, Peripheral motor neuropathy, Peripheral sensory neuropathy, Polyneuropathy Deep vein thrombosis : Deep vein thrombosis, Thrombosis, Venous thrombosis After At Least One Prior Therapy for MM: Data were evaluated from 703 patients in two studies who received at least one dose of lenalidomide/dexamethasone (353 patients) or placebo/dexamethasone (350 patients). In the lenalidomide/dexamethasone treatment group, 269 patients (76%) had at least one dose interruption with or without a dose reduction of lenalidomide compared to 199 patients (57%) in the placebo/dexamethasone treatment group. Of these patients who had one dose interruption with or without a dose reduction, 50% in the lenalidomide/dexamethasone treatment group had at least one additional dose interruption with or without a dose reduction compared to 21% in the placebo/dexamethasone treatment group. Most adverse reactions and Grade 3/4 adverse reactions were more frequent in patients who received the combination of lenalidomide/dexamethasone compared to placebo/dexamethasone. Tables 6, 7 and 8 summarize the adverse reactions reported for lenalidomide/dexamethasone and placebo/dexamethasone groups. Table 6: Adverse Reactions Reported in ≥ 5% of Patients and with a ≥ 2% Difference in Proportion of Patients with MM between the lenalidomide /dexamethasone and Placebo/dexamethasone Groups Body System Adverse Reaction Lenalidomide/Dexamethasone (N=353) n (%) Placebo/Dexamethasone (N=350) n (%) Blood and lymphatic system disorders Neutropenia % 149 (42) 22 (6) Anemia @ 111 (31) 83 (24) Thrombocytopenia @ 76 (22) 37 (11) Leukopenia 28 (8) 4 (1) Lymphopenia 19 (5) 5 (1) General disorders and administration site conditions Fatigue 155 (44) 146 (42) Pyrexia 97 (27) 82 (23) Peripheral edema 93 (26) 74 (21) Chest pain 29 (8) 20 (6) Lethargy 24 (7) 8 (2) Gastrointestinal disorders Constipation 143 (41) 74 (21) Diarrhea @ 136 (39) 96 (27) Nausea @ 92 (26) 75 (21) Vomiting @ 43 (12) 33 (9) Abdominal pain @ 35 (10) 22 (6) Dry mouth 25 (7) 13 (4) Musculoskeletal and connective tissue disorders Muscle cramp 118 (33) 74 (21) Back pain 91 (26) 65 (19) Bone pain 48 (14) 39 (11) Pain in limb 42 (12) 32 (9) Nervous system disorders Dizziness 82 (23) 59 (17) Tremor 75 (21) 26 (7) Dysgeusia 54 (15) 34 (10) Hypoesthesia 36 (10) 25 (7) Neuropathy a 23 (7) 13 (4) Respiratory, thoracic and mediastinal disorders Dyspnea 83 (24) 60 (17) Nasopharyngitis 62 (18) 31 (9) Pharyngitis 48 (14) 33 (9) Bronchitis 40 (11) 30 (9) Infections b and infestations Upper respiratory tract infection 87 (25) 55 (16) Pneumonia @ 48 (14) 29 (8) Urinary tract infection 30 (8) 19 (5) Sinusitis 26 (7) 16 (5) Skin and subcutaneous system disorders Rash c 75 (21) 33 (9) Sweating increased 35 (10) 25 (7) Dry skin 33 (9) 14 (4) Pruritus 27 (8) 18 (5) Metabolism and nutrition disorders Anorexia 55 (16) 34 (10) Hypokalemia 48 (14) 21 (6) Hypocalcemia 31 (9) 10 (3) Appetite decreased 24 (7) 14 (4) Dehydration 23 (7) 15 (4) Hypomagnesemia 24 (7) 10 (3) Investigations Weight decreased 69 (20) 52 (15) Eye disorders Blurred vision 61 (17) 40 (11) Vascular disorders Deep vein thrombosis % 33 (9) 15 (4) Hypertension 28 (8) 20 (6) Hypotension 25 (7) 15 (4) Table 7: Grade 3/4 Adverse Reactions Reported in ≥ 2% Patients and with a ≥ 1% Difference in Proportion of Patients with MM between the lenalidomide /dexamethasone and Placebo/dexamethasone groups Body System Adverse Reaction Lenalidomide/Dexamethasone (N=353) n (%) Placebo/Dexamethasone (N=350) n (%) Blood and lymphatic system disorders Neutropenia % 118 (33) 12 (3) Thrombocytopenia @ 43 (12) 22 (6) Anemia @ 35 (10) 20 (6) Leukopenia 14 (4) < 1% Lymphopenia 10 (3) 4 (1) Febrile neutropenia % 8 (2) 0 (0) General disorders and administration site conditions Fatigue 23 (7) 17 (5) Vascular disorders Deep vein thrombosis % 29 (8) 12 (3) Infections and infestations Pneumonia @ 30 (8) 19 (5) Urinary tract infection 5 (1) < 1% Metabolism and nutrition disorders Hypokalemia 17 (5) 5 (1) Hypocalcemia 13 (4) 6 (2) Hypophosphatemia 9 (3) 0 (0) Respiratory, thoracic and mediastinal disorders Pulmonary embolism @ 14 (4) < 1% Respiratory distress @ 4 (1) 0 (0) Musculoskeletal and connective tissue disorders Muscle weakness 20 (6) 10 (3) Gastrointestinal disorders Diarrhea @ 11 (3) 4 (1) Constipation 7 (2) < 1% Nausea @ 6 (2) < 1% Cardiac disorders Atrial fibrillation @ 13 (4) 4 (1) Tachycardia 6 (2) < 1% Cardiac failure congestive @ 5 (1) < 1% Nervous system disorders Syncope 10 (3) < 1% Dizziness 7 (2) < 1% Eye disorders Cataract 6 (2) < 1% Cataract unilateral 5 (1) 0 (0) Psychiatric disorder Depression 10 (3) 6 (2) Table 8: Serious Adverse Reactions Reported in ≥ 1% Patients and with a ≥ 1% Difference in Proportion of Patients with MM between the lenalidomide /dexamethasone and Placebo/dexamethasone Groups Body System Adverse Reaction Lenalidomide/Dexamethasone (N=353) n (%) Placebo/Dexamethasone (N=350) n (%) Blood and lymphatic system disorders Febrile neutropenia % 6 (2) 0 (0) Vascular disorders Deep vein thrombosis % 26 (7) 11 (3) Infections and infestations Pneumonia @ 33 (9) 21 (6) Respiratory, thoracic, and mediastinal disorders Pulmonary embolism @ 13 (4) < 1% Cardiac disorders Atrial fibrillation @ 11 (3) < 1% Cardiac failure congestive @ 5 (1) 0 (0) Nervous system disorders Cerebrovascular accident @ 7 (2) < 1% Gastrointestinal disorders Diarrhea @ 6 (2) < 1% Musculoskeletal and connective tissue disorders Bone pain 4 (1) 0 (0) For Tables 6, 7 and 8 above: @ - adverse reactions in which at least one resulted in a fatal outcome. % - adverse reactions in which at least one was considered to be life threatening (if the outcome of the reaction was death, it is included with death cases). Median duration of exposure among patients treated with lenalidomide/dexamethasone was 44 weeks while median duration of exposure among patients treated with placebo/dexamethasone was 23 weeks. This should be taken into consideration when comparing frequency of adverse reactions between two treatment groups lenalidomide/dexamethasone vs. placebo/dexamethasone. Venous and Arterial Thromboembolism [see Boxed Warning , Warnings and Precautions (5.4) ] VTE and ATE are increased in patients treated with lenalidomide. Deep vein thrombosis (DVT) was reported as a serious (7.4%) or severe (8.2%) adverse drug reaction at a higher rate in the lenalidomide/dexamethasone group compared to 3.1% and 3.4% in the placebo/dexamethasone group, respectively in the 2 studies in patients with at least 1 prior therapy with discontinuations due to DVT adverse reactions reported at comparable rates between groups. In the NDMM study, DVT was reported as an adverse reaction (all grades: 10.3%, 7.2%, 4.1%), as a serious adverse reaction (3.6%, 2.0%, 1.7%) and as a Grade 3/4 adverse reaction (5.6%, 3.7%, 2.8%) in the Rd Continuous, Rd18 and MPT Arms, respectively. Discontinuations and dose reductions due to DVT adverse reactions were reported at comparable rates between the Rd Continuous and Rd18 Arms (both <1%). Interruption of lenalidomide treatment due to DVT adverse reactions was reported at comparable rates between the Rd Continuous (2.3%) and Rd18 (1.5%) arms. Pulmonary embolism (PE) was reported as a serious adverse drug reaction (3.7%) or Grade 3/4 (4.0%) at a higher rate in the lenalidomide/dexamethasone group compared to 0.9% (serious or grade 3/4) in the placebo/dexamethasone group in the 2 studies in patients with, at least 1 prior therapy, with discontinuations due to PE adverse reactions reported at comparable rates between groups. In the NDMM study, the frequency of adverse reactions of PE was similar between the Rd Continuous, Rd18 and MPT Arms for adverse reactions (all grades: 3.9%, 3.3% and 4.3%, respectively), serious adverse reactions (3.8%, 2.8% and 3.7%, respectively), and grade 3/4 adverse reactions (3.8%, 3.0% and 3.7%, respectively). Myocardial infarction was reported as a serious (1.7%) or severe (1.7%) adverse drug reaction at a higher rate in the lenalidomide/dexamethasone group compared to 0.6% and 0.6% respectively in the placebo/dexamethasone group. Discontinuation due to MI (including acute) adverse reactions was 0.8% in lenalidomide/dexamethasone group and none in the placebo/dexamethasone group. In the NDMM study, myocardial infarction (including acute) was reported as an adverse reaction (all grades: 2.4%, 0.6% and 1.1%), as a serious adverse reaction, (2.3%, 0.6% and 1.1%), or as a severe adverse reaction (1.9%, 0.6% and 0.9%) in the Rd Continuous, Rd18 and MPT Arms, respectively. Stroke (CVA) was reported as a serious (2.3%) or severe (2.0%) adverse drug reaction in the lenalidomide/dexamethasone group compared to 0.9% and 0.9% respectively in the placebo/dexamethasone group. Discontinuation due to stroke (CVA) was 1.4% in lenalidomide/dexamethasone group and 0.3% in the placebo/dexamethasone group. In the NDMM study, CVA was reported as an adverse reaction (all grades: 0.8%, 0.6% and 0.6%), as a serious adverse reaction (0.8%, 0.6 % and 0.6%), or as a severe adverse reaction (0.6%, 0.6%, 0.2%) in the Rd Continuous, Rd18 and MPT arms respectively. Other Adverse Reactions: After At Least One Prior Therapy for MM In these 2 studies, the following adverse drug reactions (ADRs) not described above that occurred at ≥ 1% rate and of at least twice of the placebo percentage rate were reported: Blood and lymphatic system disorders: pancytopenia, autoimmune hemolytic anemia Cardiac disorders: bradycardia, myocardial infarction, angina pectoris Endocrine disorders: hirsutism Eye disorders: blindness, ocular hypertension Gastrointestinal disorders: gastrointestinal hemorrhage, glossodynia General disorders and administration site conditions: malaise Investigations: liver function tests abnormal, alanine aminotransferase increased Nervous system disorders: cerebral ischemia Psychiatric disorders: mood swings, hallucination, loss of libido Reproductive system and breast disorders: erectile dysfunction Respiratory, thoracic and mediastinal disorders: cough, hoarseness Skin and subcutaneous tissue disorders: exanthem, skin hyperpigmentation Myelodysplastic Syndromes: A total of 148 patients received at least 1 dose of 10 mg lenalidomide in the del 5q MDS clinical study. At least one adverse reaction was reported in all of the 148 patients who were treated with the 10 mg starting dose of lenalidomide. The most frequently reported adverse reactions were related to blood and lymphatic system disorders, skin and subcutaneous tissue disorders, gastrointestinal disorders and general disorders and administrative site conditions . Thrombocytopenia (61.5%; 91/148) and neutropenia (58.8%; 87/148) were the most frequently reported adverse reactions. The next most common adverse reactions observed were diarrhea (48.6%; 72/148), pruritus (41.9%; 62/148), rash (35.8%; 53/148) and fatigue (31.1%; 46/148). Table 9 summarizes the adverse reactions that were reported in ≥ 5% of the lenalidomide treated patients in the del 5q MDS clinical study. Table 10 summarizes the most frequently observed Grade 3 and Grade 4 adverse reactions regardless of relationship to treatment with lenalidomide. In the single-arm studies conducted, it is often not possible to distinguish adverse reactions that are drug-related and those that reflect the patient’s underlying disease. Table 9: Summary of Adverse Reactions Reported in ≥ 5% of the lenalidomide Treated Patients in del 5q MDS Clinical Study Body System Adverse Reaction a 10 mg Overall (N=148) Patients with at least one adverse reaction 148 (100) Blood and Lymphatic System Disorders Thrombocytopenia 91 (61) Neutropenia 87 (59) Anemia 17 (11) Leukopenia 12 (8) Febrile Neutropenia 8 (5) Skin and Subcutaneous Tissue Disorders Pruritus 62 (42) Rash 53 (36) Dry Skin 21 (14) Contusion 12 (8) Night Sweats 12 (8) Sweating Increased 10 (7) Ecchymosis 8 (5) Erythema 8 (5) Gastrointestinal Disorders Diarrhea 72 (49) Constipation 35 (24) Nausea 35 (24) Abdominal Pain 18 (12) Vomiting 15 (10) Abdominal Pain Upper 12 (8) Dry Mouth 10 (7) Loose Stools 9 (6) Respiratory, Thoracic and Mediastinal Disorders Nasopharyngitis 34 (23) Cough 29 (20) Dyspnea 25 (17) Pharyngitis 23 (16) Epistaxis 22 (15) Dyspnea Exertional 10 (7) Rhinitis 10 (7) Bronchitis 9 (6) General Disorders and Administration Site Conditions Fatigue 46 (31) Pyrexia 31 (21) Edema Peripheral 30 (20) Asthenia 22 (15) Edema 15 (10) Pain 10 (7) Rigors 9 (6) Chest Pain 8 (5) Musculoskeletal and Connective Tissue Disorders Arthralgia 32 (22) Back Pain 31 (21) Muscle Cramp 27 (18) Pain in Limb 16 (11) Myalgia 13 (9) Peripheral Swelling 12 (8) Nervous System Disorders Dizziness 29 (20) Headache 29 (20) Hypoesthesia 10 (7) Dysgeusia 9 (6) Peripheral Neuropathy 8 (5) Infections and Infestations Upper Respiratory Tract Infection 22 (15) Pneumonia 17 (11) Urinary Tract Infection 16 (11) Sinusitis 12 (8) Cellulitis 8 (5) Metabolism and Nutrition Disorders Hypokalemia 16 (11) Anorexia 15 (10) Hypomagnesemia 9 (6) Investigations Alanine Aminotransferase Increased 12 (8) Psychiatric Disorders Insomnia 15 (10) Depression 8 (5) Renal and Urinary Disorders Dysuria 10 (7) Vascular Disorders Hypertension 9 (6) Endocrine Disorders Acquired Hypothyroidism 10 (7) Cardiac Disorders Palpitations 8 (5) a Body System and adverse reactions are coded using the MedDRA dictionary. Body System and adverse reactions are listed in descending order of frequency for the Overall column. A patient with multiple occurrences of an adverse reaction is counted only once under the applicable Body System/Adverse Reaction. Table 10: Most Frequently Observed Grade 3 and 4 Adverse Reactions 1 Regardless of Relationship to Study Drug Treatment in the del 5q MDS Clinical Study Adverse Reactions 2 10 mg (N=148) Patients with at least one Grade 3/4 AE 131 (89) Neutropenia 79 (53) Thrombocytopenia 74 (50) Pneumonia 11 (7) Rash 10 (7) Anemia 9 (6) Leukopenia 8 (5) Fatigue 7 (5) Dyspnea 7 (5) Back Pain 7 (5) Febrile Neutropenia 6 (4) Nausea 6 (4) Diarrhea 5 (3) Pyrexia 5 (3) Sepsis 4 (3) Dizziness 4 (3) Granulocytopenia 3 (2) Chest Pain 3 (2) Pulmonary Embolism 3 (2) Respiratory Distress 3 (2) Pruritus 3 (2) Pancytopenia 3 (2) Muscle Cramp 3 (2) Respiratory Tract Infection 2 (1) Upper Respiratory Tract Infection 2 (1) Asthenia 2 (1) Multi-organ Failure 2 (1) Epistaxis 2 (1) Hypoxia 2 (1) Pleural Effusion 2 (1) Pneumonitis 2 (1) Pulmonary Hypertension 2 (1) Vomiting 2 (1) Sweating Increased 2 (1) Arthralgia 2 (1) Pain in Limb 2 (1) Headache 2 (1) Syncope 2 (1) 1 Adverse reactions with frequency ≥1% in the 10 mg Overall group. Grade 3 and 4 are based on National Cancer Institute Common Toxicity Criteria version 2. 2 Adverse reactions are coded using the MedDRA dictionary. A patient with multiple occurrences of an adverse reaction is counted only once in the adverse reaction category. In other clinical studies of lenalidomide in MDS patients, the following serious adverse reactions (regardless of relationship to study drug treatment) not described in Table 9 or 10 were reported: Blood and lymphatic system disorders: warm type hemolytic anemia, splenic infarction, bone marrow depression, coagulopathy, hemolysis, hemolytic anemia, refractory anemia Cardiac disorders: cardiac failure congestive, atrial fibrillation, angina pectoris, cardiac arrest, cardiac failure, cardio-respiratory arrest, cardiomyopathy, myocardial infarction, myocardial ischemia, atrial fibrillation aggravated, bradycardia, cardiogenic shock, pulmonary edema, supraventricular arrhythmia, tachyarrhythmia, ventricular dysfunction Ear and labyrinth disorders: vertigo Endocrine disorders: Basedow’s disease Gastrointestinal disorders: gastrointestinal hemorrhage, colitis ischemic, intestinal perforation, rectal hemorrhage, colonic polyp, diverticulitis, dysphagia, gastritis, gastroenteritis, gastroesophageal reflux disease, obstructive inguinal hernia, irritable bowel syndrome, melena, pancreatitis due to biliary obstruction, pancreatitis, perirectal abscess, small intestinal obstruction, upper gastrointestinal hemorrhage General disorders and administration site conditions: disease progression, fall, gait abnormal, intermittent pyrexia, nodule, rigors, sudden death Hepatobiliary disorders: hyperbilirubinemia, cholecystitis, acute cholecystitis, hepatic failure Immune system disorders: hypersensitivity Infections and infestations: infection bacteremia, central line infection, clostridial infection, ear infection, Enterobacter sepsis, fungal infection, herpes viral infection NOS, influenza, kidney infection, Klebsiella sepsis, lobar pneumonia, localized infection, oral infection, Pseudomonas infection, septic shock, sinusitis acute, sinusitis, Staphylococcal infection, urosepsis Injury, poisoning and procedural complications: femur fracture, transfusion reaction, cervical vertebral fracture, femoral neck fracture, fractured pelvis, hip fracture, overdose, post procedural hemorrhage, rib fracture, road traffic accident, spinal compression fracture Investigations: blood creatinine increased, hemoglobin decreased, liver function tests abnormal, troponin I increased Metabolism and nutrition disorders: dehydration, gout, hypernatremia, hypoglycemia Musculoskeletal and connective tissue disorders: arthritis, arthritis aggravated, gouty arthritis, neck pain, chondrocalcinosis pyrophosphate Neoplasms benign, malignant and unspecified: acute leukemia, acute myeloid leukemia, bronchoalveolar carcinoma, lung cancer metastatic, lymphoma, prostate cancer metastatic Nervous system disorders: cerebrovascular accident, aphasia, cerebellar infarction, cerebral infarction, depressed level of consciousness, dysarthria, migraine, spinal cord compression, subarachnoid hemorrhage, transient ischemic attack Psychiatric disorders: confusional state Renal and urinary disorders: renal failure, hematuria, renal failure acute, azotemia, calculus ureteric, renal mass Reproductive system and breast disorders: pelvic pain Respiratory, thoracic and mediastinal disorders: bronchitis, chronic obstructive airways disease exacerbated, respiratory failure, dyspnea exacerbated, interstitial lung disease, lung infiltration, wheezing Skin and subcutaneous tissue disorders: acute febrile neutrophilic dermatosis Vascular system disorders: deep vein thrombosis, hypotension, aortic disorder, ischemia, thrombophlebitis superficial, thrombosis 6.2 Post-marketing Experience The following adverse drug reactions have been identified from the worldwide post-marketing experience with lenalidomide. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure [see Warnings and Precautions Section (5.8 to 5.11 and 5.13) ] Endocrine disorders: Hypothyroidism, hyperthyroidism Hepatobiliary disorders: Hepatic failure (including fatality), toxic hepatitis, cytolytic hepatitis, cholestatic hepatitis, mixed cytolytic/cholestatic hepatitis, transient abnormal liver laboratory tests Immune system disorders: Angioedema, anaphylaxis, acute graft-versus-host disease (following allogeneic hematopoietic transplant), solid organ transplant rejection Infections and infestations: Viral reactivation (such as hepatitis B virus and herpes zoster), progressive multifocal leukoencephalopathy (PML) Neoplasms benign, malignant and unspecified (including cysts and polyps): Tumor lysis syndrome, tumor flare reaction Respiratory, thoracic and mediastinal disorders: Pneumonitis Skin and subcutaneous tissue disorders: Stevens-Johnson Syndrome, toxic epidermal necrolysis, drug reaction with eosinophilia and systemic symptoms (DRESS)

8.1 Pregnancy Pregnancy Exposure Registry There is a pregnancy exposure registry that monitors pregnancy outcomes in females exposed to lenalidomide during pregnancy as well as female partners of male patients who are exposed to lenalidomide. This registry is also used to understand the root cause for the pregnancy. Report any suspected fetal exposure to lenalidomide to the FDA via the MedWatch program at 1-800-FDA-1088 and also to the REMS Call Center at 1-888-423-5436. Risk Summary Based on the mechanism of action [see Clinical Pharmacology (12.1) ] and findings from animal studies [see Data], lenalidomide can cause embryo-fetal harm when administered to a pregnant female and is contraindicated during pregnancy [see Boxed Warning , Contraindications (4.1) and Use in Specific Populations (5.1) ] . Lenalidomide is a thalidomide analogue. Thalidomide is a human teratogen, inducing a high frequency of severe and life-threatening birth defects such as amelia (absence of limbs), phocomelia (short limbs), hypoplasticity of the bones, absence of bones, external ear abnormalities (including anotia, micropinna, small or absent external auditory canals), facial palsy, eye abnormalities (anophthalmos, microphthalmos) and congenital heart defects. Alimentary tract, urinary tract and genital malformations have also been documented and mortality at or shortly after birth has been reported in about 40% of infants. Lenalidomide caused thalidomide-type limb defects in monkey offspring. Lenalidomide crossed the placenta after administration to pregnant rabbits and pregnant rats [see Data] . If this drug is used during pregnancy, or if the patient becomes pregnant while taking this drug, the patient should be apprised of the potential risk to a fetus. If pregnancy does occur during treatment, immediately discontinue the drug. Under these conditions, refer patient to an obstetrician/gynecologist experienced in reproductive toxicity for further evaluation and counseling. Report any suspected fetal exposure to lenalidomide to the FDA via the MedWatch program at 1-800-FDA-1088 and also to the REMS Call Center at 1-888-423-5436. The estimated background risk of major birth defects and miscarriage for the indicated population is unknown. All pregnancies have a background risk of birth defect, loss, or other adverse outcomes. The estimated background risk in the U.S. general population of major birth defects is 2% to 4% and of miscarriage is 15% to 20% of clinically recognized pregnancies. Data Animal data In an embryo-fetal developmental toxicity study in monkeys, teratogenicity, including thalidomide-like limb defects, occurred in offspring when pregnant monkeys received oral lenalidomide during organogenesis. Exposure (AUC) in monkeys at the lowest dose was 0.17 times the human exposure at the maximum recommended human dose (MRHD) of 25 mg. Similar studies in pregnant rabbits and rats at 20 times and 200 times the MRHD respectively, produced embryo lethality in rabbits and no adverse reproductive effects in rats. In a pre- and post-natal development study in rats, animals received lenalidomide from organogenesis through lactation. The study revealed a few adverse effects on the offspring of female rats treated with lenalidomide at doses up to 500 mg/kg (approximately 200 times the human dose of 25 mg based on body surface area). The male offspring exhibited slightly delayed sexual maturation and the female offspring had slightly lower body weight gains during gestation when bred to male offspring. As with thalidomide, the rat model may not adequately address the full spectrum of potential human embryo-fetal developmental effects for lenalidomide. Following daily oral administration of lenalidomide from Gestation Day 7 through Gestation Day 20 in pregnant rabbits, fetal plasma lenalidomide concentrations were approximately 20% to 40% of the maternal C max. Following a single oral dose to pregnant rats, lenalidomide was detected in fetal plasma and tissues; concentrations of radioactivity in fetal tissues were generally lower than those in maternal tissues. These data indicated that lenalidomide crossed the placenta.