Zantac & Pepcid are used to counteract it
... if 
you are allergic to famotidine or similar medications such as ranitidine (Zantac),... [DOC] [TLE] Zantac Uses, Dosage & Side Effects - Drugs.com [PAR] Zantac (ranitidine) is used to treat and prevent ulcers in the stomach and 
intestines.