Fexofenadine Hydrochloride & Montelukast Sodium Tablets are a combination medication used to treat allergic rhinitis and related respiratory symptoms. Fexofenadine is a non-drowsy antihistamine that relieves sneezing, runny nose, and itching, while Montelukast is a leukotriene receptor antagonist that helps reduce nasal congestion, inflammation, and breathing difficulties. Together, they offer effective, long-lasting relief from seasonal and perennial allergies, as well as mild asthma-related symptoms.