Zesty-FX Tablet is a combination medication containing Montelukast 10 mg and Fexofenadine 120 mg, formulated for the management of allergic conditions such as seasonal allergic rhinitis and chronic urticaria. Montelukast, a leukotriene receptor antagonist, works by inhibiting the action of leukotrienes, which are inflammatory mediators responsible for bronchoconstriction, mucus production, and airway edema. Fexofenadine, a second-generation antihistamine, selectively blocks peripheral H1 histamine receptors, thereby reducing symptoms like sneezing, itching, nasal congestion, and hives without causing significant sedation. The synergistic effect of Montelukast and Fexofenadine provides comprehensive relief from both early and late-phase allergic responses. Zesty-FX is indicated for patients requiring dual therapy to control allergic symptoms effectively, particularly when monotherapy is insufficient. It is generally well-tolerated; common adverse effects may include headache, dizziness, and gastrointestinal discomfort. Caution is advised in patients with hepatic or renal impairment, and it should be used under medical supervision in pregnant or lactating women. Zesty-FX Tablet offers a convenient once-daily dosing regimen, enhancing patient compliance and improving quality of life in individuals suffering from allergic disorders.