Formoterol is a long-acting bronchodilator used primarily to treat respiratory conditions such as asthma and chronic obstructive pulmonary disease (COPD). It works by relaxing the muscles in the airways, making it easier to breathe. Formoterol is often prescribed in combination with inhaled corticosteroids to enhance its effectiveness. This medication is typically administered through an inhaler, allowing for direct delivery to the lungs. Formoterol can provide relief for up to 12 hours, making it suitable for both daily management and as needed for sudden breathing difficulties. It is important to follow a healthcare provider's instructions when using this medication.