The side effects of Cyproheptadine the active ingredient in this is mainly used for Allergies such as itchiness, red skin, eczema, sneezing, watery eyes and blocked or runny nose. It is also used for Migraine and other similar headaches. Composit side effects of Oraxin Drowsiness, Dryness of mouth, mental confusion, ataxia, dizziness, headache, weight gain, thickening of mucus in the nose/throat. Though Many people use cyproheptadine as an appetite stimulant I do not as some authorities believe this has untoward effects on growth hormone level. There are better appetite stimulants I give only if parents force and after changing the diet and feeding pattern and observing weight and growth of he child. Take care regards.