AIRSUPRA

1 INDICATIONS AND USAGE AIRSUPRA is indicated for the as-needed treatment or prevention of bronchoconstriction and to reduce the risk of exacerbations in patients with asthma 18 years of age and older. AIRSUPRA is a combination of albuterol, a beta 2 -adrenergic agonist and budesonide, a corticosteroid, indicated for the as-needed treatment or prevention of bronchoconstriction and to reduce the risk of exacerbations in patients with asthma 18 years of age and older. ( 1 )

2 DOSAGE AND ADMINISTRATION • Recommended Dosage: AIRSUPRA 180 mcg/160 mcg (administered as 2 actuations of albuterol/budesonide 90 mcg/80 mcg) by oral inhalation as needed for asthma symptoms. ( 2.1 ) • Do not take more than 6 doses (12 inhalations) in a 24-hour period. ( 2.1 ) • Prime inhaler prior to first use. Re-prime when inhaler has not been used for more than 7 days, is dropped, or after cleaning. ( 2.2 ) • Discard when the dose counter displays 0. ( 2.3 ) 2.1 Recommended Dosage and Administration The recommended dosage of AIRSUPRA is albuterol 180 mcg and budesonide 160 mcg (administered as 2 actuations of AIRSUPRA [albuterol/budesonide 90 mcg/80 mcg]) as needed for asthma symptoms by oral inhalation. Do not take more than 6 doses (12 inhalations) in a 24-hour period [see Warnings and Precautions (5.4) ] . 2.2 Priming Before Use • Priming AIRSUPRA is essential to ensure appropriate drug content in each actuation. Prime AIRSUPRA before using for the first time. To prime AIRSUPRA, release 4 sprays into the air away from the face, shaking well before each spray. • AIRSUPRA must be re-primed when the inhaler has not been used for more than 7 days, is dropped, or after cleaning. To re-prime AIRSUPRA, release 2 sprays into the air away from the face, shaking well before each spray. 2.3 Dose Counter The canister has an attached dose indicator (also known as puff indicator) which indicates how many inhalations (puffs) remain. The dose indicator pointer will move after every actuation. The pointer will show the number of inhalations remaining in the canister. When nearing the end of the usable inhalations, the color behind the number in the dose indicator display window changes to yellow. AIRSUPRA should be discarded when the pointer reaches zero.

4 CONTRAINDICATIONS AIRSUPRA is contraindicated in patients with a history of hypersensitivity to albuterol, budesonide, or any of the excipients [see Warnings and Precautions (5.5) , Description (11) ] . Hypersensitivity to albuterol, budesonide, or to any of the excipients. ( 4 )

5 WARNINGS AND PRECAUTIONS • If symptoms continue after using AIRSUPRA, this may be a marker of destabilization of asthma and requires reevaluation of treatment. ( 5.1 ) • If paradoxical bronchospasm occurs, discontinue AIRSUPRA immediately and institute alternative therapy. ( 5.2 ) • Cardiovascular effects may occur. Use with caution in patients sensitive to sympathomimetic drugs and patients with cardiovascular disorders. ( 5.3 ) • Excessive use may be fatal. Do not exceed maximum recommended dosage. ( 5.4 ) • Hypersensitivity reactions may occur. Discontinue AIRSUPRA immediately. ( 5.5 ) • Use with caution in patients with convulsive disorders, hyperthyroidism, diabetes mellitus, and ketoacidosis. ( 5.6 ) • Hypokalemia may occur. ( 5.7 ) • Potential worsening of infections (e.g., existing tuberculosis; fungal, bacterial, viral, or parasitic infections; or ocular herpes simplex). Use with caution in patients with these infections. More serious or even fatal course of chickenpox or measles can occur in susceptible patients. ( 5.8 ) • Oropharyngeal candidiasis may occur. Advise patients to rinse mouth with water, if available, without swallowing after use. Monitor patients periodically. ( 5.9 ) • Hypercorticism and adrenal suppression may occur with very high dosages in susceptible individuals. If such changes occur, consider appropriate therapy. ( 5.10 ) • Monitor patients with major risk factors for decreased bone mineral content. ( 5.11 ) • Glaucoma and cataracts may occur. Consider referral to an ophthalmologist in patients who develop ocular symptoms. ( 5.12 ) 5.1 Deterioration of Asthma Asthma may deteriorate acutely over a period of hours or chronically over several days or longer. If the patient continues to experience symptoms after using AIRSUPRA or requires more doses of AIRSUPRA than usual, this may be a marker of destabilization of asthma and requires evaluation of the patient and their treatment regimen. 5.2 Paradoxical Bronchospasm AIRSUPRA can produce paradoxical bronchospasm, which may be life threatening. If paradoxical bronchospasm occurs following dosing with AIRSUPRA, it should be discontinued immediately, and alternative therapy should be instituted. It should be recognized that paradoxical bronchospasm, when associated with inhaled formulations, frequently occurs with the first use of a new canister. 5.3 Cardiovascular Effects AIRSUPRA, like other drugs containing beta 2 -adrenergic agonists, can produce clinically significant cardiovascular effects in some patients as measured by increases in pulse rate, blood pressure, and/or other symptoms. If such effects occur, AIRSUPRA may need to be discontinued. In addition, beta-agonists have been reported to produce electrocardiogram (ECG) changes, such as flattening of the T wave, prolongation of the QTc interval, and ST-segment depression. The clinical significance of these findings is unknown. Therefore, AIRSUPRA, like all sympathomimetic amines, should be used with caution in patients with cardiovascular disorders, especially coronary insufficiency, cardiac arrhythmias, and hypertension. 5.4 Do Not Exceed Recommended Dosage As with other inhaled drugs containing beta-adrenergic agents, AIRSUPRA should not be used more than the maximum daily dose [see Dosage and Administration (2.1) ] , as an overdose may result. Clinically significant cardiovascular effects and fatalities have been reported in association with excessive use of inhaled sympathomimetic drugs. 5.5 Hypersensitivity Reactions, Including Anaphylaxis Hypersensitivity reactions can occur after administration of albuterol sulfate and budesonide, components of AIRSUPRA, as demonstrated by cases of anaphylaxis, angioedema, bronchospasm, oropharyngeal edema, rash, and urticaria. Discontinue AIRSUPRA if such reactions occur [see Contraindications (4) ] . 5.6 Risk of Sympathomimetic Amines with Certain Coexisting Conditions AIRSUPRA, like all therapies containing sympathomimetic amines, should be used with caution in patients with convulsive disorders, hyperthyroidism, or diabetes mellitus and in patients who are unusually responsive to sympathomimetic amines. Large doses of intravenous albuterol have been reported to aggravate preexisting diabetes mellitus and ketoacidosis. 5.7 Hypokalemia Beta-adrenergic agonist medicines may produce significant hypokalemia in some patients, possibly through intracellular shunting, which has the potential to produce adverse cardiovascular effects [see Warnings and Precautions (5.3) , Clinical Pharmacology (12.1) ] . The decrease in serum potassium is usually transient, not requiring supplementation. 5.8 Immunosuppression and Risk of Infections Patients who are using drugs that suppress the immune system are more susceptible to infection. Chicken pox and measles, for example, can have a more serious or even fatal course in susceptible patients using corticosteroids. In patients who have not had these diseases or been properly immunized, particular care should be taken to avoid exposure. How the dose, route, and duration of corticosteroid administration affects the risk of developing a disseminated infection is not known. The contribution of the underlying disease and/or prior corticosteroid treatment to the risk is also not known. If a patient is exposed to chicken pox, prophylaxis with varicella zoster immune globulin (VZIG) may be indicated. If exposed to measles, prophylaxis with pooled intramuscular immunoglobulin (IG) may be indicated (see the respective Prescribing Information for VZIG and IG). If chicken pox develops, treatment with antiviral agents may be considered. Inhaled corticosteroids should be used with caution, if at all, in patients with active or quiescent tuberculosis infection of the respiratory tract; untreated systemic fungal, bacterial, viral, or parasitic infections; or ocular herpes simplex. 5.9 Oropharyngeal Candidiasis AIRSUPRA contains budesonide, an inhaled corticosteroid (ICS). Localized infections of the mouth and pharynx with Candida albicans have occurred in patients treated with ICS agents. Monitor patients periodically. When such an infection develops, it should be treated with appropriate local or systemic (i.e., oral) antifungal therapy while treatment with AIRSUPRA continues. In some cases, therapy with AIRSUPRA may need to be interrupted. Advise the patient to rinse his/her mouth with water, if available, without swallowing following administration of AIRSUPRA to help reduce the risk of oropharyngeal candidiasis. 5.10 Hypercorticism and Adrenal Suppression Budesonide, a component of AIRSUPRA, will often help control asthma symptoms with less suppression of hypothalamic-pituitary-adrenal (HPA) function than therapeutically equivalent oral doses of prednisone. Since budesonide is absorbed into the circulation and can be systemically active at higher doses, the beneficial effects of AIRSUPRA in minimizing HPA dysfunction may be expected only when recommended dosages are not exceeded. Since individual sensitivity to effects on cortisol production exists, physicians should consider this information when prescribing AIRSUPRA. Because of the possibility of systemic absorption of ICS, patients treated with AIRSUPRA should be observed carefully for any evidence of systemic corticosteroid effects. Particular care should be taken in observing patients postoperatively or during periods of stress for evidence of inadequate adrenal response. It is possible that systemic corticosteroid effects such as hypercorticism and adrenal suppression (including adrenal crisis) may appear in a small number of patients who are sensitive to these effects. If such effects occur, appropriate therapy should be initiated as needed. 5.11 Reduction in Bone Mineral Density Decreases in bone mineral density (BMD) have been observed with long-term administration of products containing ICS. The clinical significance of small changes in BMD with regard to long-term consequences such as fracture is unknown. Patients with major risk factors for decreased bone mineral content, such as prolonged immobilization, family history of osteoporosis, post-menopausal status, tobacco use, advanced age, poor nutrition, or chronic use of drugs that can reduce bone mass (e.g., anticonvulsants, oral corticosteroids) should be monitored and treated with established standards of care. 5.12 Glaucoma and Cataracts Glaucoma, increased intraocular pressure, and cataracts have been reported following the long-term administration of ICS, including budesonide, a component of AIRSUPRA. Consider referral to an ophthalmologist in patients who develop ocular symptoms. 5.13 Drug Interactions with Strong Cytochrome P450 3A4 Inhibitors Caution should be exercised when considering the co-administration of AIRSUPRA with long-term ketoconazole and other known strong CYP3A4 inhibitors (e.g., ritonavir, atazanavir, clarithromycin, indinavir, itraconazole, nefazodone, nelfinavir, saquinavir, telithromycin) because adverse effects related to increased systemic exposure to budesonide may occur [see Drug Interactions (7.1) , Clinical Pharmacology (12.3) ] . 5.14 Effects on Growth in Pediatric Patients Orally inhaled corticosteroids, including budesonide, may cause a reduction in growth velocity when administered to pediatric patients. The safety and effectiveness of AIRSUPRA have not been established in pediatric patients, and AIRSUPRA is not indicated for use in this population [see Use in Specific Populations (8.4) ] .

7 DRUG INTERACTIONS No formal drug interaction studies have been performed with AIRSUPRA. • Strong cytochrome P450 3A4 inhibitors (e.g. ritonavir): Use with caution. May cause systemic corticosteroid effects. ( 7.1 ) • Other short-acting bronchodilators: Use judiciously with other short-acting beta agonists. ( 7.2 ) • Beta blockers: May decrease effectiveness of AIRSUPRA and produce severe bronchospasm. When there are no acceptable alternatives to the use of beta-adrenergic-blocking agents, consider cardioselective beta-blockers and use with caution. ( 7.3 ) • Diuretics, or non-potassium-sparing diuretics: May potentiate hypokalemia or ECG changes. Consider monitoring potassium levels with concomitant use. ( 7.4 ) • Digoxin: May decrease serum digoxin levels. Carefully evaluate digoxin levels with concomitant use. ( 7.5 ) • Monoamine oxidase inhibitors (MAOI) and tricyclic antidepressants: Use AIRSUPRA with extreme caution with concomitant use. ( 7.6 ) 7.1 Inhibitors of Cytochrome P450 3A4 The main route of metabolism of corticosteroids, including budesonide, a component of AIRSUPRA, is via cytochrome P450 (CYP) isoenzyme 3A4 (CYP3A4). After oral administration of ketoconazole, a strong inhibitor of CYP3A4, the mean plasma concentration of orally administered budesonide increased. Concomitant administration of a CYP3A4 inhibitor may inhibit the metabolism of, and increase the systemic exposure to, budesonide. Caution should be exercised when considering the co-administration of AIRSUPRA with long-term ketoconazole and other known strong CYP3A4 inhibitors (e.g., ritonavir, atazanavir, clarithromycin, indinavir, itraconazole, nefazodone, nelfinavir, saquinavir, telithromycin) [see Warnings and Precautions (5.11) ] . 7.2 Use with Other Short-Acting Bronchodilators AIRSUPRA contains the short-acting beta-agonist, albuterol. Therefore, concomitant use of additional beta-agonists with AIRSUPRA should be used judiciously to prevent beta-agonist overdose. 7.3 Beta-Blockers Beta-adrenergic receptor blocking agents not only block the pulmonary effect of beta-agonists, such as albuterol, a component of AIRSUPRA, but may also produce severe bronchospasm in patients with asthma. Therefore, patients with asthma should not normally be treated with beta-blockers. However, under certain circumstances, e.g., as prophylaxis after myocardial infarction, there may be no acceptable alternatives to the use of beta-adrenergic-blocking agents in these patients. In this setting, consider cardioselective beta-blockers, although they should be administered with caution. 7.4 Diuretics The ECG changes and/or hypokalemia which may result from the administration of non-potassium-sparing diuretics (such as loop or thiazide diuretics) can be acutely worsened by beta-agonists, especially when the recommended dose of the beta-agonist is exceeded. Although the clinical significance of these effects is not known, caution is advised in the coadministration of AIRSUPRA with non-potassium-sparing diuretics. Consider monitoring potassium levels. 7.5 Digoxin Mean decreases of 16% and 22% in serum digoxin levels were demonstrated after single-dose intravenous and oral administration of albuterol, respectively, to normal volunteers who had received digoxin for 10 days. The clinical significance of these findings for patients with obstructive airway disease who are receiving albuterol and digoxin on a chronic basis is unclear. Nevertheless, it would be prudent to carefully evaluate the serum digoxin levels in patients who are currently receiving digoxin and AIRSUPRA. 7.6 Monoamine Oxidase Inhibitors or Tricyclic Antidepressants AIRSUPRA should be administered with extreme caution to patients being treated with monoamine oxidase inhibitors or tricyclic antidepressants, or within 2 weeks of discontinuation of such agents, because the action of albuterol on the cardiovascular system may be potentiated.

6 ADVERSE REACTIONS The following clinically significant adverse reactions are described elsewhere in labeling: • Deterioration of Asthma [see Warnings and Precautions (5.1) ] • Paradoxical Bronchospasm [see Warnings and Precautions (5.2) ] • Cardiovascular Effects [see Warnings and Precautions (5.3) ] • Hypersensitivity Reactions, including Anaphylaxis [see Warnings and Precautions (5.5) ] • Hypokalemia [see Warnings and Precautions (5.7) ] • Immunosuppression and Risk of Infections [see Warnings and Precautions (5.8) ] • Oropharyngeal Candidiasis [see Warnings and Precautions (5.9) ] • Hypercorticism and Adrenal Suppression [see Warnings and Precautions (5.10) ] • Reduction in Bone Mineral Density [see Warnings and Precautions (5.11) ] • Glaucoma and Cataracts [see Warnings and Precautions (5.12) ] • Effects on Growth in Pediatric Patients [see Warnings and Precautions (5.14) ] Most common adverse reactions (incidence ≥ 1%) are headache, oral candidiasis, cough, dysphonia. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact AstraZeneca at 1-800-236-9933 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. The safety of AIRSUPRA is based on data from 3 trials: MANDALA, DENALI and BATURA [see Clinical Studies (14) ] . All reported safety data is based on patients who received AIRSUPRA 180 mcg/160 mcg. While patients 12 to 17 years of age were included in these trials, AIRSUPRA is not approved in this age group [see Use in Specific Populations (8.4) ] . In MANDALA, AIRSUPRA 180 mcg/160 mcg was administered as needed in patients with asthma who were receiving medium to high dose ICS or low to high dose ICS/LABA, with or without another controller medicine as maintenance therapy. A total of 1015 patients 12 to 84 years of age (mean age: 51 years) received at least one dose of AIRSUPRA and participated in the study for a mean duration of 310 days. Of these, 905 patients were exposed for at least 24 weeks and 323 patients had exposure for at least 1 year. The mean daily use was 2.6 actuations. On the majority of study days, patients used 2 or less actuations; more than 8 actuations were used on less than 2% of study days. The incidence of common adverse reactions in MANDALA is described in Table 1. Table 1 Summary of Adverse Reactions with AIRSUPRA Reported in ≥ 1% of Patients (MANDALA) Adverse Reaction AIRSUPRA 180 mcg/160 mcg N = 1015 (%) AS MDI 1 180 mcg N = 1015 (%) Headache 44 (4.3) 50 (4.9) Oral candidiasis 2 13 (1.3) 5 (0.5) Cough 10 (1.0) 11 (1.1) 1 Albuterol Metered Dose Inhaler = AS MDI 2 Oral candidiasis also includes those reactions reported under the preferred term oropharyngeal candidiasis. The safety profile of AIRSUPRA in MANDALA was similar to that observed with AS MDI, irrespective of background ICS dose. In DENALI, AIRSUPRA 180 mcg/160 mcg was administered 4 times a day for 12 weeks in patients with asthma who were previously treated with as-needed short-acting beta 2 -agonists (SABA) alone or with low-dose ICS maintenance therapy plus as-needed SABA. A total of 197 patients 13 to 81 years of age (mean age: 50 years) received at least one dose of AIRSUPRA. The adverse reactions profile was similar to MANDALA except for the following adverse reactions for AIRSUPRA with an incidence ≥ 1.0% that exceeded the incidence in MANDALA: headache (5.1%), dysphonia (2.0%), and oral/oropharyngeal candidiasis (1.5%), compared to headache (7.1%), dysphonia (0%), and oral/oropharyngeal candidiasis (0%) in the placebo arm. In BATURA, AIRSUPRA 180 mcg/160 mcg was administered as needed for 12 to 52 weeks in patients with asthma who were previously treated with as-needed SABA alone, or as-needed SABA plus background maintenance of either low-dose ICS or leukotriene receptor antagonist (LTRA). The 26% of patients on background ICS or LTRA were instructed to continue these treatments throughout the study period. A total of 1209 patients 12 to 95 years of age (mean age: 43 years) received at least one dose of AIRSUPRA and participated in the study for a mean duration of 259 days. Of them, 1109 patients were exposed for at least 12 weeks and 258 patients were exposed for at least 1 year. The mean daily use was 1.5 actuations for AIRSUPRA and 1.8 actuations for AS MDI 180 mcg. On the majority of study days, patients used 2 or less actuations of AIRSUPRA or AS MDI 180 mcg; more than 8 actuations were used on 2% of study days for patients on AIRSUPRA and 4% of study days for patients on AS MDI 180 mcg. The safety profile of AIRSUPRA in BATURA was similar to that in MANDALA. 6.2 Postmarketing Experience The following adverse reactions have been identified during post-approval use of budesonide or albuterol. 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. Cardiovascular disorders : myocardial ischemia, tremor, tachycardia, palpitations, extrasystoles, arrhythmias (including atrial fibrillation, supraventricular tachycardia), syncope, hypertension, peripheral vasodilatation Endocrine disorders : signs or symptoms of systemic glucocorticosteroid effect (including hypofunction of the adrenal gland and reduction of growth rate) Eye disorders : cataracts, glaucoma, increased intraocular pressure Immune system disorders : immediate and delayed hypersensitivity reactions (including anaphylactic reaction, angioedema, bronchospasm, rash, contact dermatitis and urticaria) General disorders : fever, weight gain, taste perversion, flu syndrome Gastrointestinal disorders : nausea, vomiting, dyspepsia, diarrhea Infections : sinusitis, pharyngitis, respiratory tract infection, nasopharyngitis, gastroenteritis, otitis media, laryngitis Metabolic disorders : hypokalemia, metabolic acidosis Musculoskeletal disorders : hypertonia, musculoskeletal pain, myalgia, asthenia, arthralgia, muscle cramps, fracture Neurological or psychiatric system disorders : migraine, dizziness, central nervous system stimulation, insomnia, hyperactivity, psychiatric symptoms (including psychosis, depression, aggressive reactions, irritability, nervousness, restlessness, behavioral disturbances and anxiety) Respiratory, thoracic, and mediastinal disorders : rhinitis, nasal congestion, throat irritation, oropharyngeal edema, upper respiratory inflammation, drying or irritation of the oropharynx Skin and subcutaneous tissue disorders : skin bruising, ecchymosis

8.1 Pregnancy Pregnancy Exposure Registry There is a pregnancy exposure registry that monitors pregnancy outcomes in women exposed to asthma medications during pregnancy. For more information, contact the MotherToBaby Pregnancy Studies conducted by the Organization of Teratology Information Specialists at 1-877-311-8972 or visit http://mothertobaby.org/pregnancy-studies/ . Risk Summary Available data from published case series, epidemiological studies and reviews with budesonide use in pregnant women have not identified a drug-related risk of major birth defects, miscarriage or other adverse maternal or fetal outcomes. Available data from epidemiological studies and postmarketing case reports of pregnancy outcomes following inhaled albuterol use do not consistently demonstrate a risk of major birth defects or miscarriage. The available epidemiological studies have methodologic limitations, including inconsistent comparator groups, definitions of outcomes, and assessment of disease impact. There are risks to the mother and fetus associated with asthma in pregnancy (see Clinical Considerations) . Animal reproduction studies have not been conducted with AIRSUPRA, however, animal studies are available with its individual components, albuterol and budesonide. Administration of albuterol to mice and rabbits during the period of organogenesis revealed evidence of adverse developmental outcomes (cleft palate in mice, delayed ossification in rabbits) at less than maximum recommended human daily inhalation dose (MRHDID) (see Data) . In animal reproduction studies, budesonide, administered by the subcutaneous route, caused structural abnormalities, was embryocidal, and reduced fetal weights in rats and rabbits at less than the MRHDID in adults, but these effects were not seen in rats that received inhaled doses approximately 2.5 times the MRHDID in adults (see Data) . Experience with oral corticosteroids suggests that rodents are more prone to structural abnormalities from corticosteroid exposure than humans. The background risk of major birth defects and miscarriage of the indicated populations is unknown. All pregnancies have a background risk of birth defect, loss, or other adverse outcomes. In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2% to 4% and 15% to 20%, respectively. Clinical Considerations Disease-Associated Maternal and/or Embryo/Fetal risk In women with poorly or moderately controlled asthma, there is an increased risk of several perinatal adverse outcomes such as preeclampsia in the mother and prematurity, low birth weight, and small for gestational age in the neonate. Pregnant women with asthma should be closely monitored and medication adjusted as necessary to maintain optimal asthma control. Labor or Delivery Because of the potential for beta-agonist interference with uterine contractility, use of AIRSUPRA during labor should be restricted to those patients in whom the benefits clearly outweigh the risk. AIRSUPRA has not been approved for the management of pre-term labor. Serious adverse reactions, including pulmonary edema, have been reported during or following treatment of premature labor with beta 2 -agonists, including albuterol. Data Animal Data Albuterol In a study in pregnant mice, subcutaneously administered albuterol sulfate produced cleft palate formation in 5 of 111 (4.5%) fetuses at an exposure less than the MRHDID in adults (on a mg/m 2 basis at a maternal dose of 0.25 mg/kg) and in 10 of 108 (9.3%) fetuses at approximately 9 times the MRHDID in adults (on a mg/m 2 basis at a maternal dose of 2.5 mg/kg). Cleft palate also occurred in 22 of 72 (30.5%) fetuses from females treated subcutaneously with isoproterenol, another beta 2 -agonist. In a study in pregnant rabbits, orally administered albuterol sulfate produced cranioschisis in 7 of 19 fetuses (37%) at approximately 750 times the MRHDID in adults (on a mg/m 2 basis at a maternal dose of 50 mg/kg). In a study in pregnant rabbits, an albuterol/HFA-134a formulation administered by inhalation produced enlargement of the frontal portion of the fetal fontanelles at approximately one third of the MRHDID on a mg/m 2 basis. A study in which pregnant rats were dosed with radiolabeled albuterol sulfate demonstrated that drug-related material is transferred from the maternal circulation to the fetus. Budesonide In a fertility and reproduction study, male rats were subcutaneously dosed with budesonide for 9 weeks and females for 2 weeks prior to pairing and throughout the mating period. Females were dosed up until weaning of their offspring. Budesonide caused a decrease in prenatal viability and viability in the pups at birth and during lactation, along with a decrease in maternal body-weight gain, at doses 0.2 times the MRHDID in adults (on a mcg/m 2 basis at maternal subcutaneous doses of 20 mcg/kg/day and above). No such effects were noted at a dose 0.05 times the MRHDID in adults (on a mcg/m 2 basis at a maternal subcutaneous dose of 5 mcg/kg/day). In an embryo-fetal development study in pregnant rabbits dosed during the period of organogenesis from gestation days 6-18, budesonide produced fetal loss, decreased fetal weight, and skeletal abnormalities at doses 0.5 times the MRHDID in adults (on a mcg/m 2 basis at a maternal subcutaneous dose of 25 mcg/kg/day). In an embryo-fetal development study in pregnant rats dosed during the period of organogenesis from gestation days 6-15, budesonide produced similar adverse fetal effects at doses approximately 5 times the MRHDID in adults (on a mcg/m 2 basis at a maternal subcutaneous dose of 500 mcg/kg/day). In another embryo-fetal development study in pregnant rats, no structural abnormalities or embryocidal effects were seen at doses approximately 2.5 times the MRHDID in adults (on a mcg/m 2 basis at maternal inhalation doses up to 250 mcg/kg/day). In a peri- and post-natal development study, rats were dosed from gestation day 15 to postpartum day 21. Budesonide had no effects on delivery but did have an effect on growth and development of offspring. Offspring survival was reduced and surviving offspring had decreased mean body weights at birth and during lactation at doses 0.2 times the MRHDID in adults and higher (on a mcg/m 2 basis at maternal subcutaneous doses of 20 mcg/kg/day and higher). These findings occurred in the presence of maternal toxicity.