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-a-methyl-a-phenylbenzyl-1-oxy]ethyl]-1-
methylpyrrolidine fumarate. It has molecular formula
and its molecular weight
Clemastine fumarate occurs as a colorless to faintly yellow, odorless,
crystalline powder. Clemastine Fumarate Syrup has an approximate
pH of 6.2.