Can Benadryl Make You Sleepy?
Yes, Benadryl can make you sleepy. In fact, drowsiness is its most common side effect. The active ingredient, diphenhydramine, is an antihistamine that blocks histamine in your body. But it also crosses into your brain and affects other receptors there. That is what causes the drowsy feeling. Many people use Benadryl specifically for this reason … Read more