What Is Cyproheptadine?

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  • Written By: Jay Leone
  • Edited By: Rachel Catherine Allen
  • Last Modified Date: 24 January 2019
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Cyproheptadine refers to an antihistamine medication that contains cyproheptadine hydrochloride. This medication, designed for oral administration, is often prescribed to alleviate certain allergy symptoms. Some people may experience side effects after taking this medication alone or in combination with certain other medications. It may cause complications in patients suffering from certain conditions and should only be taken as prescribed.

Manufacturers produce cyproheptadine in tablet and liquid forms. They are for oral administration and contain cyproheptadine hydrochloride. Tablets contain four milligrams of this active ingredient as well as traces of magnesium stearate, sodium starch glycolate, purified water, and other inactive ingredients. Cyproheptadine hydrochloride itself is a slightly yellowish to white, crystalline solid. This material is soluble in water and chloroform but practically insoluble in ether.

Cyproheptadine can relieve the runny nose, sneezing, itchy eyes, and other symptoms usually associated with year-round allergies, and is also often prescribed to treat hives and itching brought on by certain skin conditions. Cushing’s syndrome is a hormone disorder that is also often treated with cyproheptadine.


Taking this medication may cause negative side effects. Hallucinations, ringing in the ears, easy bruising, and pounding or fast heartbeat are all very serious side effects linked with this medication. Other possible side effects include loss of coordination, increased appetite, blurred vision, and upset stomach. Patients should discontinue use and contact their doctor immediately after experiencing any adverse reactions. Signs of allergic reactions to this medication include swelling of the face and difficulty breathing.

A person with glaucoma or stomach problems, such as peptic ulcers, should consult his or her doctor before taking this antihistamine because it can lead to further complications. Urinary problems including bladder obstructions and enlarged prostate may worsen while taking cyproheptadine. This medication may also further complicate other conditions including high-blood pressure, overactive thyroid, and heart disease. Patients who are allergic to antihistamines should never take this particular medication or any other antihistamine.

This medication for storage at room temperature. Tablets and oral solutions should be stored in containers away from moisture and light. Bathrooms are not ideal storage locations because of the constantly changing humidity and temperature levels associated with these rooms of the house. A person should never freeze his or her cyproheptadine solution.



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