It is very common to feel concerned when symptoms return after stopping a medication. Telekast 10 (montelukast) is generally safe for long-term use under a doctor's guidance to manage allergy-related breathing issues. Because it controls rather than cures your symptoms, they can return when you stop taking it. If you are looking for alternatives, options like daily steroid nasal sprays, non-drowsy antihistamines, or even allergen immunotherapy could be very effective. Please discuss these with your doctor to find a personalized long-term plan that keeps you breathing easily and comfortably.