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Cyproheptadine

Pronounced

"sigh-pro-HEP-tah-deen"

Common brand names:

Periactin

Uses

Cyproheptadine is an antihistamine used to relieve allergy symptoms such as watery eyes, runny nose, itching eyes/nose, sneezing, hives, and itching. It works by blocking a certain natural substance (histamine) that your body makes during an allergic reaction. This medication also blocks another natural substance in your body (serotonin).

This medication should not be used in newborn or premature infants.

How to Use This Medication

Take this medication by mouth with or without food as directed by your doctor, usually 2 to 3 times a day. If you are using the liquid form of this medication, carefully measure the dose using a special measuring device/spoon. Do not use a household spoon because you may not get the correct dose.

The dosage is based on your age, medical condition, and response to treatment. Children's dosage may also be based on weight and body size. Do not increase your dose or take this medication more often than directed.

Tell your doctor if your condition does not improve or if it worsens.

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Drug information is selected from data included with permission and copyrighted by First DataBank, Inc. This is a summary and does not contain all possible information about this product. For complete information about this product or your specific health needs, ask your healthcare professional. Always seek the advice of your healthcare professional if you have any questions about this product or your medical condition. This information is not intended as individual medical advice and does not substitute for the knowledge and judgment of your healthcare professional. This information does not contain any assurances that this product is safe, effective or appropriate for you.

This information is intended only for residents of the United States. Products sold under the same brand names in other countries may contain different ingredients.

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Information expires December 2025.