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Benadryl is a brand name for a number of different medications. In the United States and Canada, it contains the antihistamine diphenhydramine. In the United Kingdom, it contains either the antihistamine acrivastine (marketed as Benadryl Allergy Relief) or the long acting antihistamine cetirizine (marketed as Benadryl One a Day Relief). Benadryl products are marketed in Australia and New Zealand as a cough medicine and do not contain any antihistamine.

Benadryl is available for oral or topical use. It is marketed over-the-counter by Johnson & Johnson subsidiary McNeil Consumer Healthcare. Before 2007, Benadryl was marketed by Pfizer Consumer Healthcare.[1][2] Benadryl Chesty Cough & Nasal Congestion contains guaifenesin (an expectorant) and pseudoephedrine hydrochloride as the active ingredients.[3]


  1. ^ "Johnson & Johnson to Acquire Pfizer Consumer Healthcare" (Press release). Johnson & Johnson. June 26, 2006. Retrieved November 19, 2009. 
  2. ^ "Johnson & Johnson Completes Acquisition Of Pfizer Consumer Healthcare" (Press release). Johnson & Johnson. December 20, 2006. Retrieved November 19, 2009. 
  3. ^ Benadryl for the Family Chesty Cough & Nasal Congestion Oral Liquid ; accessed Oct. 13, 2011

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