SPL Set ID: 88ac92eb-5684-46c8-8cd2-3d4aefee26cf

The active ingredient in famotidine for oral suspension is a histamine-2 (H2) receptor antagonist. Famotidine is N' -(aminosulfonyl)-3-[[[2-[(diaminomethylene)amino]-4- thiazolyl]methyl]thio]propanimidamide. The molecular formula of famotidine is C 8 H 15 N 7 O 2 S 3 and its molecular weight is 337.43. Its structural formula is: Each 5 mL of famotidine for oral suspension when prepared as directed contains 40 mg of famotidine and the following inactive ingredients: anhydrous citric acid, corn starch, flavors (cherry and mint), maltodextrin, sucrose, and xanthan gum. Added as preservatives are methylparaben sodium, propylparaben sodium and sodium benzoate. Famotidine is a white to pale yellow crystalline compound that is freely soluble in glacial acetic acid, slightly soluble in methanol, very slightly soluble in water, and practically insoluble in ethanol. Structural Formula