Fibafex M 10mg/120mg Tablet is a combination medication containing Montelukast 10mg and Fexofenadine 120mg, designed to provide effective relief from allergic conditions such as seasonal allergic rhinitis, perennial allergic rhinitis, and chronic urticaria. Montelukast is a leukotriene receptor antagonist that works by blocking substances called leukotrienes, which cause inflammation, swelling, and constriction of airways in allergic reactions. Fexofenadine is a non-sedating antihistamine that selectively blocks peripheral H1 receptors, reducing symptoms like sneezing, runny nose, itching, and watery eyes without causing drowsiness. Together, these active ingredients offer a dual mechanism of action to alleviate allergy symptoms more comprehensively than either agent alone. Fibafex M is typically prescribed for adults and children above a certain age, depending on medical advice, and should be taken orally as directed by a healthcare professional. It is important to follow the prescribed dosage and avoid using this medication if allergic to any of its components. Common side effects may include headache, dizziness, or gastrointestinal discomfort, but serious adverse reactions are rare. Patients should consult their doctor before use, especially if they have liver or kidney issues, or are pregnant or breastfeeding.