Ventolin Inhaler is a pressurised metered-dose inhaler which delivers salbutamol (as sulphate) 100 mcg per actuation, into the mouthpiece of a specially designed actuator. Each canister contains at least 200 actuations. The inhaler also contains the CFC-free propellant 1, 1, 1, 2-tetrafluoroethane (also known as HFA 134a or norflurane) as an excipient.