What are they?

What are antihistamines?

Antihistamines are medications used to treat allergies, and sometimes other symptoms or medical problems, such as motion sickness or insomnia.

There are several types of antihistamine. They work in different ways and have different effects. We have information on a few types of antihistamines on our site:

For information on other antihistamines, please call the poison center at 1-800-222-1222, chat online or text POISON to 85511.

Last Updated: Monday June 4th 2018