Diphenhydramine, also known by the brand name Benadryl, is an over-the-counter antihistamine used to relieve allergy or common cold symptoms in adults and children. It comes as pills and a liquid and is typically taken by mouth every 4 to 6 hours as needed. Because it can make you drowsy, some people also use it as a sleep aid at bedtime. Common side effects include sleepiness, dizziness, and. Benadryl (diphenhydramine)—OTC antihistamine for allergies and short-term sleep. Dosing, drowsiness, interactions, and when to prefer cetirizine instead. Amazon.com: benadryl generic Shop products from small business brands sold in Amazon’s store. Discover more about the small businesses partnering with Amazon and Amazon’s commitment to empowering them. Learn more Find patient medical information for Diphenhydramine (Benadryl, Unisom, and others) on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings Learn more, read reviews & shop Diphenhydramine at CVS Pharmacy. Diphenhydramine is Generic Benadryl - same ingredient at a better price. Enjoy Free Shipping. Many allergy tablets labeled as comparable products list diphenhydramine HCl as the active ingredient. That name is what you’ll typically see on the Drug Facts panel for the generic version. Check “Active ingredient” for “diphenhydramine HCl,” often 25 mg per tablet or capsule; some capsules list 50 mg. Match the strength and dosage form (tablet, capsule, or liquid gel) to what you. Benadryl is an antihistamine and is used to treat sneezing, runny nose, itching and other allergies. Learn about side effects, interactions and indications. Discover the power of generic Benadryl to provide comprehensive allergy symptom relief. Explore large quantity options for long-lasting, affordable solutions. Shop for Benadryl in Allergy Medicine. Buy products such as Equate Allergy Relief Diphenhydramine HCl 25 mg Antihistamine Tablets, 365 Count, Compare to Benadryl Allergy Ultra tab Active Ingredient at Walmart and save. Diphenhydramine is an antihistamine used to treat sneezing, runny nose, itching, hives and other symptoms of allergies and the common cold. Includes diphenhydramine side effects, interactions and indications.