If Levosiz M Tablet (Montelukast and Levocetirizine) has not helped, you should consult a dermatologist or allergist for evaluation. The doctor may suggest higher-dose antihistamines, adding other antihistamines or H2 blockers, short courses of corticosteroids, or biologic therapy such as omalizumab for chronic urticaria (hives). Avoid known triggers and keep a symptom diary to guide treatment.

Levosiz-M may not completely cure severe nasal blockage, however it can assist if your symptoms are caused by allergies. A saline or steroid nasal spray may be helpful, and if breathing problems persist, consult a physician.