Asthma drugs known as leukotriene receptor antagonists (LTRAs), such as montelukast and zafirlukast, work orally by blocking inflammatory leukotriene pathways that cause bronchoconstriction and airway swelling. They are particularly effective for individuals with allergic asthma, aspirin-exacerbated respiratory disease, or co-existing allergic rhinitis. LTRAs offer a non-steroidal oral...