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. Amazon.com: benadryl generic For Rashes, Insect and Bug Bites, Fits in Backpack or First Aid Kit, Outdoor Activities, Sporting Events, Picnics, Camping 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. 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. 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. Benadryl is an antihistamine and is used to treat sneezing, runny nose, itching and other allergies. Learn about side effects, interactions and indications. Shop for Benadryl in Allergy Medicine. Buy products such as Benadryl Allergy Medicine for Adults, Ultratablets, 25 mg Diphenhydramine HCl, 100 Count Size at Walmart and save. Discover the power of generic Benadryl to provide comprehensive allergy symptom relief. Explore large quantity options for long-lasting, affordable solutions. Benadryl (diphenhydramine) is a brand-name over-the-counter drug that’s used for allergies and itchy skin. Learn about side effects, price, and more.