Periactin 4mg Tablets Periactin 4mg Tablets are used to treat: Skin allergies with itchiness, swelling, or red skin, eczema or nettle rash. Itchiness of chicken pox & reactions to insect bites & stings. Sneezing, watery eyes & blocked or runny nose caused by an allergy such as hayfever (allergic rhinitis). Conjunctivitis caused by an allergy
- with red, watery, inflamed eyes. Migraine & other similar headaches. These conditions cause too much histamine & serotonin to be produced in the body. Periactin 4mg Tablets contain the active ingredient cyproheptadine, an antihistamine that stops the unwanted effects of histamine & seratonin to relieve the symptoms that too much of these substances causes.