Long-acting muscarinic antagonists (LAMAs) are primarily used to treat chronic obstructive pulmonary disease (COPD). But certain medications in this class can also be used for asthma. LAMAs work by blocking the action of acetylcholine, a chemical that causes the muscles around your airways to tighten, making it easier for you to breathe. These medications come in different forms, including inhalers and nebulizer solutions. Examples include tiotropium (Spiriva Handihaler, Spiriva Respimat), umeclidinium (Incruse Ellipta), and aclidinium (Tudorza Pressair). You can discuss with your healthcare team which option might be right for you.