COMMON & BRAND NAMES
Benadryl; Benylin; Nytol; Sominex; DPH
Antihistamine; Sedative; Antiemetic; Antivertigo; Antitussive; Topical Anaesthetic
Diphenhydramine (DPH) is an antihistamine with anticholinergic and sedative effects. It is found in both OTC and prescription drugs used in the treatment of allergy-related symptoms, some cold and flu symptoms, insomnia, motion sickness and Parkinson's disease.
Many oral diphenhydramine preparations contain analgesics such as acetaminophen/paracetamol or aspirin, which can be toxic to the liver in high doses.