Diphenhydramine

Diphenhydramine is an antihistamine medication used to relieve allergy symptoms like sneezing, runny nose, itchy eyes, and itching. It also helps with motion sickness, nausea, and can be used as a sleep aid. It works by blocking histamine, a chemical your body releases during allergic reactions. This reduces symptoms and provides relief. Diphenhydramine is available over-the-counter and should be used as directed, as it can cause side effects like drowsiness and dizziness. It is important to avoid alcohol and operate machinery after taking it.