Diphenhydramine is a commonly used antihistamine found in various forms such as sleep aids, allergy pills, and allergy medicine. One well-known brand that contains diphenhydramine is Benadryl, which is used to alleviate allergy symptoms. In addition to providing allergy relief, diphenhydramine is also a sedative, making it a popular ingredient in sleeping pills and sleep aids. These sleep aids for adults are sometimes available in extra strength formulations, delivering a higher dosage of diphenhydramine, typically 50mg, to promote a deeper sleep experience. However, for those who prefer a milder option, diphenhydramine sleep aids are also available in 25mg doses. Generic versions of Benadryl, known as generic diphenhydramine, are often more affordable alternatives. It's worth noting that while diphenhydramine provides sedative effects, other options like melatonin are also commonly used as natural sleep aids.