Dosage

Health

How Long Does Benadryl Stay in Your System?

What is Benadryl and How Does it Work? Benadryl is a brand name for the drug diphenhydramine, which is an antihistamine medication. Antihistamines work by blocking the effects of histamine, a natural substance produced by the body in response to allergens such as pollen, dust, or pet dander. Histamine is responsible for causing symptoms such as sneezing, itching, and runny…