SPL Set ID: 8e7f9c85-d165-47c7-8950-b22adcd6cece

The active ingredient in famotidine for oral suspension USP is a histamine-2 (H 2) receptor antagonist. Famotidine is Propanimidamide, N’(aminosulfonyl)-3[[[2[(diaminomethylene)amino]-4-thiazolyl]methyl]thio]-. The empirical formula of famotidine is C 8 H 15 N 7 O 2 S 3 and its molecular weight is 337.45. Its structural formula is: Each 5 mL of famotidine for oral suspension, USP when prepared as directed contains 40 mg of famotidine USP and the following inactive ingredients: citric acid, flavors (banana, cherry and peppermint),and powder cellulose, sucrose and xanthan gum. Added as preservatives are sodium benzoate 0.38%, sodium methylparaben 0.38% and sodium propylparaben 0.08%. Famotidine USP is a white to pale yellow crystalline powder that is freely soluble in glacial acetic acid, slightly soluble in methanol, very slightly soluble in water. famotidine-structure