Geck-M Tab is prescribed for treatment of asthma, seasonal & perennial rhinitis, and allergic conditions. It is formulated using a combination of two drugs including levocetirizine which is third generation non-sedative histamine and montelukast which is leukotriene receptor antagonist. This tablet is known to work by blocking histamine & leukotriene which result in anti-allergic action and reduction in swelling in nose & airways. Geck-M Tab exerts its effects by inhibiting cysteinyl leukotriene cysLT1 receptor and peripheral H1 receptor. It is greatly admired for having targeted mode of action and no adverse side effects if consumed under prescription.