Ventolin HFA is a bronchodilator used to treat a variety of different breathing conditions such as wheezing shortness of breath. Therefore, Ventolin HFA works well when combating symptoms of asthma and chronic obstructive pulmonary disease (COPD). Ventolin HFA works by relaxing airway muscles so that oxygen can reach the lungs. Ventolin Hfa is a plastic inhaler containing a double-foil blister strip. Ventolin Hfa is an anticholinergic bronchodilator approved for the long-term, once-daily, maintenance treatment of chronic obstructive pulmonary disease. Ventolin Hfa belongs to the class of drugs called long-acting muscarinic antagonists. Ventolin Hfa is used in the controlling and prevention of symptoms caused by ongoing lung disease. Ventolin Hfa must be used regularly to be effective. It does not work right away and should not be used to relieve sudden shortness of breath. In a case of sudden shortness or wheezing of breath occurs, use your quick-relief inhaler as prescribed. Ventolin Hfa works by relaxing the muscles around the airways so that they open up and you can breathe more easily. After activating the inhaler, the powder inside the blister is exposed and ready for dispersion down the airstream generated by the patient inhaling through the mouth.