Hhfexo M 10mg/120mg Tablet is a combination medication containing Montelukast 10mg and Fexofenadine 120mg, indicated for the management of allergic conditions such as allergic rhinitis and chronic urticaria. Montelukast, a leukotriene receptor antagonist, works by blocking leukotrienes, substances in the body that cause inflammation, bronchoconstriction, and mucus production, thereby reducing symptoms like nasal congestion, sneezing, and airway inflammation. Fexofenadine, a second-generation antihistamine, selectively inhibits peripheral H1 receptors, alleviating symptoms including itching, hives, and rhinorrhea without causing significant sedation. The combined action of Montelukast and Fexofenadine provides comprehensive relief from allergic symptoms by targeting multiple pathways involved in allergic responses. Hhfexo M is typically administered orally once daily, with or without food, as prescribed by a healthcare professional. It is important to adhere to the prescribed dosage and duration to achieve optimal therapeutic outcomes. Caution is advised in patients with hepatic or renal impairment, and potential drug interactions should be reviewed prior to initiation. Common side effects may include headache, dizziness, and gastrointestinal discomfort. Patients experiencing severe adverse reactions or hypersensitivity should seek immediate medical attention. This medication should be stored in a cool, dry place away from direct sunlight.