Jump to navigation Jump to search
- In the U.S., Benadryl is diphenhydramine, a first generation antihistamine. It is also formulated in combination with other active ingredients and sold under variations of the Benadryl name.
- In the U.K., Benadryl Allergy Relief is acrivastine, a second generation antihistamine.
- In the U.K., Benadryl Once a Day is cetirizine, a second generation antihistamine.