TEFANYL is the trade name of Ketotifen Hydrogen Fumarate a benzocycloheptathiophene derivative, an antihistaminic and an antiallergic agent with an asthmatic prophylactic activity.

Each TEFANYL Tablet contains 1mg Ketotifen as Ketotifen Hydrogen Fumarate.

Each 5mL of TEFANYL Syrup contain 1mg Ketotifen as Ketotifen Hydrogen Fumarate.

CHEMISTRY

Ketotifen is: 4,9-Dihydro-4-(1-methyl-4-piperidinylidene)-10H-benzo[4,5] cyclohepta [1,2-b] thiophen-10-one.