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Antihistamines are a class of agents that block histamine release from histamine-1 receptors and are mostly used to treat allergies or cold and flu symptoms, although some first-generation antihistamines may also be used for other conditions.
Antihistamine vs. Decongestant Decongestant Different medications can treat allergies , including steroids and allergy shots, but usually the first thing to try is an antihistamine .
The first-generation antihistamine diphenhydramine is the main active ingredient in Benadryl. Benadryl helps relieve runny nose, sneezing, itchy or watery eyes, and nose or throat itching.
An antihistamine is a type of medicine used to treat common allergy symptoms, such as sneezing, watery eyes, hives, and a runny nose. According to the American College of Allergy, Asthma ...
Oral antihistamines are medications used to treat symptoms of congestion, runny nose, the common cold, sneezing, itchy throat, skin rashes, hives, itching, and watery or itchy eyes. Some antihistamines also are used to treat anxiety, insomnia, and motion sickness.
Antihistamine drugs fall into two groups-those that block H 1 receptors and act mainly on blood vessels, and those that block H 2 receptors and act mainly on the secretion of acid in the stomach. H 1 receptor blockers include diphenhydramine, chlorpheniramine (chlorphenamine) (Piriton), terfenadine (Triludan), promethazine (Phenergan ...