Look Up > Histamine Antagonists Histamine Antagonists  Brand Names   Generic Names Axid Axid AR [OTC] Cimetidine Famotidine Nizatidine Pepcid RPD Pepcid Pepcid AC Acid Controller [OTC] Ranitidine Bismuth Citrate Ranitidine Hydrochloride Tagamet Tagamet HB [OTC] Tritec Zantac Zantac 75 [OTC]