DIPHENHYDRAMINE, TAB 25MG (1000/BT 12BT/CS) Geri-Dryl® Allergy Relief Tablets 25 mg Diphenydramine Hydrochloride Antihistamine Relieves sneezing, itchy, watery eyes, itchy throat, and runny nose. Compares to the active ingredient in Benadryl® Ultratabs. Not Made with Natural Rubber Latex. Packaged: 1000 Per Bottle, 12 Bottles Per Case Benadryl is a registered trademark of Pfizer Inc.