But medical information is always changing, and some information given here may be out of date. For regularly updated information on a variety of health topics, please visit familydoctor.org , the AAFP patient education Web site.
Antihistamines help stop the symptoms caused by allergies.
Itchy eyes, sneezing and runny noses may be helped by an antihistamine. That means they won't make you sleepy. Nonsedating medicines are better for people who work with machinery or drive cars. When your doctor gives you a prescription, always ask if it's safe to use with the other medicines you're taking. Your pharmacist can tell you the medicines you shouldn't take with a prescription antihistamine.