ファモチジンふぁもちじんMeanings1nounfamotidineA histamine H2 receptor antagonist used to treat peptic ulcers and gastroesophageal reflux disease. Medical term.ファモチジンは胃い酸さんの分ぶん泌ぴつを抑おさえる薬くすりです。Famotidine is a drug that suppresses gastric acid secretion.