Diphenhydramine (Benadryl)

10 Common Allergy Triggers Slideshow

• Diphenhydramine (Benadryl) Information
• Why is Benadryl Used?
• Who Should Not Take Benadryl?
• What Should I Tell My Doctor?
• What Are Some Possible Side Effects of Benadryl?
• For More Information and Label Information
• Synonyms and Keywords
• Authors and Editors

Diphenhydramine (Benadryl) Information

Benadryl is the brand name. Diphenhydramine is the generic name. Numerous other generic products also exist. Benadryl is an antihistamine used to treat hay fever and allergies. For information on antihistamines and how they work, see Understanding Allergy and Hay Fever Medications.
 
Basic medication information for Benadryl (NDA #006146) is as follows:

• Active ingredient: Diphenhydramine hydrochloride



• Dosage forms: Injection, oral capsule, tablets, or elixir



• Strength: 50 mg/mL injection, 25 and 50 mg capsules/tablets, 12.5 mg/5 mL elixir



• FDA original approval: March 6, 1947



• Company name (original): Parke Davis