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cyproheptadine hydrochloride solution

Generic: Cyproheptadine Hydrochloride

Verified·Apr 23, 2026
Manufacturer
Merck
NDC
58657-697
RxCUI
866144
Route
ORAL
ICD-10 indication
J30.9

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About cyproheptadine hydrochloride solution

What is this medication? Cyproheptadine hydrochloride solution is a prescription medication categorized as an antihistamine. It is primarily used to relieve symptoms associated with seasonal and perennial allergies, such as sneezing, runny nose, and itchy or watery eyes. Doctors also prescribe it to treat certain skin conditions like hives or itching caused by allergic reactions. Because it blocks the effects of histamine in the body, it helps reduce the discomfort often triggered by environmental allergens or mild physical irritants. Beyond common allergy symptoms, this medication is sometimes used for its antiserotonergic properties. It can be utilized to treat conditions such as cluster headaches or certain types of vascular headaches. In some clinical settings, it is prescribed to help stimulate appetite in patients who have difficulty maintaining a healthy weight. Additionally, it may be used to manage mild cases of serotonin syndrome or to treat cold-induced hives. Patients should follow their healthcare provider's instructions carefully, as this solution can cause significant drowsiness.

Copay & patient assistance

Detailed copay and financial assistance information is not publicly available for this medication at this time. Please consult your pharmacist or the manufacturer's official patient support program for more details.

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Prescribing information

From the FDA-approved label for cyproheptadine hydrochloride solution. Official source: DailyMed (NLM) · Label effective Oct 21, 2025

Indications and usage
INDICATIONS AND USAGE Perennial and seasonal allergic rhinitis Vasomotor rhinitis Allergic conjunctivitis due to inhalant allergens and foods Mild, uncomplicated allergic skin manifestations of urticaria and angioedema Amelioration of allergic reactions to blood or plasma Cold urticaria Dermatographism As therapy for anaphylactic reactions adjunctive to epinephrine and other standard measures after the acute manifestations have been controlled.
Dosage and administration
DOSAGE AND ADMINISTRATION DOSAGE SHOULD BE INDIVIDUALIZED ACCORDING TO THE NEEDS AND THE RESPONSE OF THE PATIENT. Although intended primarily for administration to children, the syrup is also used for administration to adults who cannot swallow tablets. Children: The total daily dosage for children may be calculated on the basis of body weight or body area using approximately 0.25 mg/kg/day (0.11 mg/lb/day) or 8 mg per square meter of body surface (8 mg/m 2 ). Age 2 to 6 years: The usual dose is 2 mg (one teaspoonful) two or three times a day, adjusted as necessary to the size and response of the patient. The dose is not to exceed 12 mg a day. Age 7 to 14 years: The usual dose is 4 mg (two teaspoonsful) two or three times a day, adjusted as necessary to the size and response of the patient. The dose is not to exceed 16 mg a day. Adults: The total daily dose for adults should not exceed 0.5 mg/kg/day (0.23 mg/lb/day). The therapeutic range is 4 to 20 mg a day, with the majority of patients requiring 12 to 16 mg a day. An occasional patient may require as much as 32 mg a day for adequate relief. It is suggested that dosage be initiated with 4 mg (two teaspoonsful) three times a day and adjusted according to the size and response of the patient.
Contraindications
CONTRAINDICATIONS Newborn or Premature Infants: This drug should not be used in newborn or premature infants. Nursing Mothers: Because of the higher risk of antihistamines for infants generally and for newborns and prematures in particular, antihistamine therapy is contraindicated in nursing mothers. Other Conditions: Hypersensitivity to cyproheptadine and other drugs of similar chemical structure Monoamine oxidase inhibitor therapy (see Drug Interactions ) Angle-closure glaucoma Stenosing peptic ulcer Symptomatic prostatic hypertrophy Bladder neck obstruction Pyloroduodenal obstruction Elderly, debilitated patients
Warnings
WARNINGS Children: Overdosage of antihistamines, particularly in infants and children, may produce hallucinations, central nervous system depression, convulsions and death. Antihistamines may diminish mental alertness; conversely, particularly in the young child, they may occasionally produce excitation. CNS Depressants: Antihistamines may have additive effects with alcohol and other CNS depressants, e.g., hypnotics, sedatives, tranquilizers, antianxiety agents. Activities Requiring Mental Alertness: Patients should be warned about engaging in activities requiring mental alertness and motor coordination, such as driving a car or operating machinery. Antihistamines are more likely to cause dizziness, sedation and hypotension in elderly patients.
Adverse reactions
ADVERSE REACTIONS Adverse reactions which have been reported with the use of antihistamines are as follows: Central Nervous System: Sedation and sleepiness (often transient), dizziness, disturbed coordination, confusion, restlessness, excitation, nervousness, tremor, irritability, insomnia, paresthesias, neuritis, convulsions, euphoria, hallucinations, hysteria, faintness. Integumentary: Allergic manifestation of rash and edema, excessive perspiration, urticaria, photosensitivity. Special Senses: Acute labyrinthitis, blurred vision, diplopia, vertigo, tinnitus. Cardiovascular: Hypotension, palpitation, tachycardia, extrasystoles, anaphylactic shock. Hematologic: Hemolytic anemia, leukopenia, agranulocytosis, thrombocytopenia. Digestive System: Dryness of mouth, epigastric distress, anorexia, nausea, vomiting, diarrhea, constipation, jaundice. Genitourinary: Urinary frequency, difficult urination, urinary retention, early menses. Respiratory: Dryness of nose and throat, thickening of bronchial secretions, tightness of chest and wheezing, nasal stuffiness. Miscellaneous: Fatigue, chills, headache, increased appetite/weight gain.

Label text is reproduced as-is from the FDA-approved label. We do not paraphrase, summarize, or omit. Content above is for informational purposes only and is not medical advice. Always consult your prescribing clinician or pharmacist before making decisions about your medication.

Conditions we've indexed resources for

Click a condition to see copay cards, grants, and PA rules specific to it. For the full list of FDA-approved indications, see Prescribing information above.

Medicare Part D coverage

How cyproheptadine hydrochloride solution appears across Medicare Part D plan formularies nationally. Source: CMS monthly Prescription Drug Plan file (2026-04-30).

Covered by plans

53%

2,919 of 5,509 plans

Most common tier

Tier 4

On 34% of covering formularies

Prior authorization required

58%

of covering formularies

TierFormularies on this tierShare
Tier 1 (preferred generic)68
29%
Tier 2 (generic)39
17%
Tier 3 (preferred brand)47
20%
Tier 4 (non-preferred brand)81
34%

Step therapy: 0% of formularies

Quantity limits: 2% of formularies

Coverage breadth: 235 of 65 formularies

How to read this:plans on the same formulary share tier + PA rules. Your specific plan's copay depends on (a) the tier above, (b) your plan's cost-share for that tier, (c) whether you're in the initial coverage phase or past the 2026 $2,000 out-of-pocket cap. For your exact plan, check its Summary of Benefits or log in to your Medicare.gov account. Copay cards don't apply to Medicare (federal law).

Prior authorization & coverage

PayerPAStep therapyCopay tier

Medicare Part D

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How this page is sourced

  • Drug identity verified against openFDA NDC Directory.
  • Label text (when shown) originates from NLM DailyMed.
  • Copay and assistance URLs verified periodically; if you hit a broken link, tell us.