Clemastine fumarate belongs to the benzhydryl ether group of antihistaminic compounds. The chemical name is (+)-2-[-2- [(p-chloro- ?-methyl-?-phenylbenzyl) oxy] ethyl]-1-methylpyrrolidine hydrogen fumarate. It has the following structural formula:

Each 5 mL (teaspoonful) of Clemastine Fumarate Syrup for oral administration contains clemastine 0.5 mg (present as clemastine fumarate 0.67 mg). Other ingredients: Alcohol 5.5%, Flavors, Maleic Acid, Methylparaben, Propylene Glycol, Propylparaben, Purified Water, Saccharin Sodium, Sodium Hydroxide, and Sorbitol. Clemastine fumarate belongs to the benzhydryl ether group of antihistaminic compounds. The chemical name is (+)-(2R)-2-[2-[[(R)-p-Chloro-?-methyl-?-phenylbenzyl]-oxy]ethyl]-1-methylpyrrolidine fumarate and has the following structural formula: