Montefex Tablet belongs to a class of medication called 'anti-allergic' medication primarily used to treat allergic symptoms like sneezing, runny nose, congestion, stuffy nose or watery eyes.  Montefex Tablet is a combination of two drugs, namely Montelukast (leukotriene receptor antagonist) and Fexofenadine (antihistamine). Montelukast belongs to the class of leukotriene receptor antagonists that works by blocking the action of chemicals called leukotrienes that are released from the lungs causing inflammation (swelling) and increased mucus production in the airways. Thereby, reduces inflammation, mucus production and narrowing in the airways. Fexofenadine belongs to the class of antihistamines (anti-allergic drugs) that works by blocking the action of histamine, a substance responsible for causing allergic reactions.  It helps to provide relief from symptoms of allergy such as sneezing, running nose, watery eyes, itching, swelling, and congestion or stiffness. Treatment of Allergic symptoms Montefex Tablet is a combination of two drugs, namely Montelukast and Fexofenadine. Montelukast is a leukotriene receptor antagonist that blocks the action of chemicals called leukotrienes that are released from lungs causing inflammation (swelling) and increased mucus production and in the airways. Thereby, reduces inflammation, mucus production and narrowing in the airways. Fexofenadine is an antihistamine (anti-allergic drugs) that blocks the action of histamine, a substance responsible for causing allergic reactions.  It helps to provide relief from symptoms of allergy such as sneezing, running nose, watery eyes, itching, swelling, and congestion or stiffness.