Condition Treated: Used for the treatment of chronic obstructive pulmonary disorder (a lung disorder in which the flow of air to the lungs is blocked). It helps in relaxing the muscles of the air passages and making it easier to breathe. It relieves coughing, wheezing and feeling short of breath.
Usage: Your doctor will tell you how often you need to use your inhaler. 
Side Effects: Most common side effects are dryness in mouth, shortness of breath, cough, tremor, headache, palpitations, and muscle cramp.