Unisom is an antihistamine that reduces the effects of natural chemical histamine in the body. Histamine can produce symptoms of sneezing, itching, watery eyes, and runny nose. Antihistamines can cause drowsiness and are sometimes used a sleep aids.
Unisom is used to treat sneezing, runny nose, watery eyes, hives, skin rash, itching, and other cold or allergy symptoms.
Unisom is also used as a short-term treatment for sleep problems (insomnia).
Unisom may also be used for purposes not listed in this medication guide.
