It is very common for symptoms to return after stopping your medication (a combination of levocetirizine and montelukast) because it manages symptoms rather than curing the underlying allergy. For safer, long-term control, your doctor might suggest daily nasal corticosteroid sprays (such as fluticasone or mometasone), which target inflammation directly in the nose with minimal side effects. For permanent relief, consider consulting an allergist for allergy testing and immunotherapy (allergy shots or sublingual drops). Immunotherapy trains your immune system to tolerate triggers, offering a potential long-term cure. Please consult your physician before changing your treatment plan.