Is Benadryl Safe to Use as a Sleep Aid?

Benadryl can help with occasional sleeplessness but isn't recommended for regular sleep aid use. The antihistamine diphenhydramine in Benadryl causes drowsiness by blocking histamine receptors in the brain. Benadryl may cause short-term drowsiness, but tolerance to its sedating effect can develop quickly with repeated use. Do not increase the dose to try to restore the effect. Benadryl can cause next-day grogginess, confusion, blurred vision, dry mouth, constipation, and difficulty urinating, with greater risks in adults over 65. Do not combine it with alcohol or other medicines that cause drowsiness, and do not drive or operate machinery until you know how it affects you. The American Academy of Sleep Medicine recommends against using diphenhydramine to treat chronic insomnia because evidence of benefit is limited. For persistent insomnia lasting more than two weeks, consult a healthcare provider to identify underlying causes and explore safer, more effective treatment options.