Arformoterol is a bronchodilator. It works by relaxing muscles in the airways to improve breathing.

Arformoterol inhalation is used to prevent bronchoconstriction in people with chronic obstructive pulmonary disease (COPD), including chronic bronchitis and emphysema. Arformoterol will not treat a bronchospasm attack that has already begun.

Arformoterol may also be used for purposes not listed in this medication guide.

Do not use arformeterol inhalation to treat a bronchospasm attack that has already begun.

Call your doctor right away if you feel that this medicine is not working as well as usual, or if you think you need to use more than usual. An increased need for medication could be an early sign that your condition is getting worse.

Salmeterol, a medicine similar to arformoterol, has been shown to increase the risk of asthma-related death. It is not known whether arformoterol could cause this same effect in people with chronic obstructive pulmonary disease. Use only the prescribed dose of this medication, and do not use it for longer than your doctor recommends. Follow all patient instructions for safe use. Talk with your doctor about your individual risks and benefits of using arformoterol inhalation.

You should not use this medication if you are allergic to arformoterol.

Salmeterol, a medicine similar to arformoterol, has been shown to increase the risk of asthma-related death. It is not known whether arformoterol could cause this same effect in people with chronic obstructive pulmonary disease. Use only the prescribed dose of this medication, and do not use it for longer than your doctor recommends. Follow all patient instructions for safe use. Talk with your doctor about your individual risks and benefits of using arformoterol inhalation.

To make sure you can safely use arformoterol, tell your doctor if you have any of these other conditions:

• heart disease, a heart rhythm disorder, or high blood pressure;

• epilepsy or other seizure disorder;

• diabetes;

• glaucoma;

• a thyroid disorder;

• liver disease; or

• a personal or family history of "Long QT syndrome."

FDA pregnancy category C. It is not known whether arformoterol will harm an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant while using this medication.

It is not known whether arformoterol passes into breast milk or if it could harm a nursing baby. Do not use this medication without telling your doctor if you are breast-feeding a baby.

Do not give this medication to anyone under 18 years old without your doctor's advice.