The uses of Serevent include: Salmeterol is used to treat wheezing, shortness of breath, and breathing difficulties caused by asthma and chronic obstructive pulmonary disease (COPD; a group of lung diseases that includes chronic bronchitis and emphysema). It also is used to prevent bronchospasm (breathing difficulties) during exercise. Salmeterol is in a class of medications called long-acting beta agonists (LABAs). It works by relaxing and opening air passages in the lungs, making it easier to breathe.
Salmeterol comes as a dry powder to inhale by mouth using a specially designed inhaler. When salmeterol is used to treat asthma or COPD, it is usually used twice a day, in the morning and evening, about 12 hours apart. Use salmeterol at around the same times every day. When salmeterol is used to prevent breathing difficulties during exercise, it is usually used at least 30 minutes before exercise, but not more often than once every 12 hours. If you are using salmeterol twice a day on a regular basis, do not use another dose before exercising. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Use salmeterol exactly as directed. Do not use more or less of it or use it more often than prescribed by your doctor.