For your allergic rhinitis, what you are experiencing is quite common because this condition tends to be long-term and symptom-based rather than completely curable. Montair LC (or similar combinations like Teczine M) contains an antihistamine and Montelukast, which help control the allergic response, so it is normal that symptoms improve while taking it and return after stopping, especially if exposure to dust, pollen, pollution, or seasonal triggers continues. Restarting a similar combination is generally used in practice for flare-ups, but ideally, it should be done under your ENT or physician's advice so the duration and plan are adjusted properly. These medicines are often used for a few weeks to a couple of months during active symptoms, and in some cases longer if allergies are frequent. However, long-term control is usually better achieved by adding a nasal steroid spray and avoiding triggers rather than relying only on tablets. If symptoms keep coming back repeatedly, a structured long-term allergy management plan is usually needed instead of repeated self-restarting of tablets.

Continuous sneezing during weather changes is typically due to allergic rhinitis (seasonal allergies). For effective relief, you can try an over-the-counter, non-drowsy antihistamine such as Cetirizine (10 mg) or Fexofenadine (120 mg) once daily. Alternatively, a corticosteroid nasal spray like Fluticasone can be highly effective if started just before the weather shifts. Try to avoid known triggers and stay hydrated. Please consult a doctor or allergist for a definitive diagnosis and to ensure these medications are safe and appropriate for your specific health profile.

You may take an antihistamine, such as cetirizine or loratadine, to help reduce sneezing, a runny nose, and watery eyes. If these do not provide relief, your doctor may prescribe a stronger antihistamine, a nasal steroid spray, or a combination treatment. Please see your doctor if symptoms persist for more than a week or worsen.

Montair LC (Montelukast + Levocetirizine) is generally safe for daily use under medical supervision for allergic conditions. However, your symptoms returning suggest that the root cause of your cough, such as cough-variant asthma, post-nasal drip, or acid reflux, is not fully controlled. Relying on this medication long-term without a definitive diagnosis is not recommended. I advise consulting a pulmonologist for evaluation, possibly including a spirometry test. Depending on the diagnosis, safer long-term alternative medications, such as inhaled corticosteroids, may be prescribed to target the inflammation directly. Please do not change your treatment plan without medical advice.

Since your current antihistamine medications are not effective, you should see your doctor for a proper evaluation. Your doctor may recommend a stronger or different class of allergy medication, such as a non-sedating antihistamine, a nasal corticosteroid spray, or a leukotriene receptor antagonist, that is safe to use with Telmisartan. Avoid taking over-the-counter allergy medicines on your own.

Montair LC might not be completely treating the underlying problem, such as allergic rhinitis or asthma, if your allergic dry cough doesn't go away. See your doctor again to determine if you require any more treatments, such as a stronger antihistamines. To assist your doctor in finding a better solution, keep track of your symptoms and triggers