Inhaled (MDI) timed-release bronchodilator sold under the Serevent name. It may be prescribed as a maintenance drug, particularly for those with a need for its long-lasting effect. It may be helpful for schoolchildren, as many school systems restrict or prohibit the use of inhalers without the student visiting the school nurse/office first. As it is very slow acting, it would be wise to keep a faster-acting bronchodilator, such as albuterol, on the school premises as well. Salmeterol does not stop an attack once it's started - it is preventive in nature. Dry mouth, irritated throat, dizziness, headache, lightheadedness, heartburn, loss of appetite, altered taste sensation, restlessness, anxiety, nervousness, trembling, and sweating may occur but should subside as the body adjusts to the medication.

Salmeterol is a long-acting beta2-adrenergic receptor agonist drug that is currently prescribed for the treatment of asthma and chronic obstructive pulmonary disease COPD. It is currently available in both dry-powder inhalers (DPIs) and pressurised metered dose inhalers (pMDIs).