histamine blocker

a medicine used to treat the gastric effects of histamine in cases of peptic ulcers and gastritis and gastroesophageal reflux; works by blocking the effects of histamine on the receptor site known as H2

• cimetidine, Tagamet — a drug (trade name Tagamet) used to treat peptic ulcers by decreasing the secretion of stomach acid
• famotidine, Pepcid — a histamine blocker (trade name Pepcid) used to treat peptic ulcers and gastritis and esophageal reflux
• ranitidine, Zantac — a histamine blocker and antacid (trade name Zantac) used to treat peptic ulcers and gastritis and esophageal reflux

• medicine, medication, medicament, medicinal drug — something that treats or prevents or alleviates the symptoms of disease