Periactin (cyproheptadine)

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    Cyproheptadine is an antihistamine medication that eliminates different symptoms of allergy including itching, watery eyes, runny nose, hives and itching. The medication inhibits the action of histamine in body relieving allergic reactions. It also blocks serotonin to boost the effect. The drug can be used for relieving symptoms of sudden allergy outbreak, or seasonal complications. Periactin is produced in the form of pills and liquid. You can buy Periactin without prescription, but should consult with a doctor. It cannot be used in newborn babies.

    How it works?

    Histamine is a natural substance that is produced by human body as a part of defense mechanism when agents causing allergy get inside. Cyproheptadine suppresses the action of histamine in body and relieves symptoms of allergy considerably.

    How to take it?

    The medication can be taken regardless of meals 2-3 times a day. Follow the instructions on the label and doctor’s prescriptions to define an optimal dose. Use a measuring spoon, if you take Periactin in liquid form. The dosage depends on person’s age, medical condition and reaction to treatment. The dosage for children is also defined by their weight.

    Warnings for pregnant women

    Pregnant women should take Cyproheptadine carefully, because it acts as an antiserotonin agent. Therefore, it is not known whether it may affect fetus and the baby in the future, and Periactin is recommended only when the benefit outweighs possible risks. The same applies to breast feeding women: a decision should be made together with a doctor, because there is no information concerning the influence of cyproheptadine on human milk.


    If you want to purchase Periactin, consult with your doctor to decide whether it is suitable for you. Inform your doctor, if you have problems with breathing, high eye pressure, heart or kidney diseases, stomach or intestine problems (ulcers, tumors), seizures, or difficulty urinating.

    The medication may contain inactive components that cause different complications and side effects. If you are allergic to its ingredients, consider some other alternative drug. If you take other prescription or nonprescription drugs, vitamins and herbal products, you should also inform your doctor about it.

    Since this drug causes blurring of vision and dizziness, you should not perform activities that require concentration and clear vision. Do not drink alcoholic beverages when taking Periactin. The drug in liquid form can contain sugar and alcohol, so take it carefully, if you have liver disease, diabetes or other serious medical conditions.

    Side effects

    Periactin should be taken carefully, because it can have multiple side effects in different body systems including:

    1. Nervous system: depression and drowsiness, motor skills can be affected. In rare cases, a person can experience convulsions, tremor, and hallucinations. As a rule, symptoms disappear when the drug is used continuously.
    2. Gastrointestinal system: diarrhea, nausea, dry mouth, vomiting.
    3. Respiratory system: tightness in chest, dry throat and nose, wheezing.
    4. Cardiovascular system: hypotension, palpitations, tachycardia.
    5. Ocular: blurred vision, dryness in eyes, diplopia.

    Besides, cyproheptadine may also contribute to weight gain that is promoted because of appetite stimulation. In children, it can cause alertness instead of drowsiness.