It is wonderful that Montair FX (montelukast and fexofenadine) has successfully managed your asthma and allergies for six years. Because asthma is a chronic condition, you should not stop or change your dose without consulting your doctor first. Stopping suddenly could cause your symptoms to return. Your doctor can assess your current lung health and safely decide if you can gradually lower your dose or transition to a different management plan.

Your constant cough, blocked nose, and throat infections suggest underlying allergic rhinitis or sinusitis, where post-nasal drip continually irritates your throat. For long-term relief, we need to address the root cause, potentially through allergy testing to identify specific triggers. While continuing your mometasone nasal spray and montelukast/fexofenadine helps manage symptoms, a specialist like an ENT doctor or allergist can help design a personalized, long-term plan, which might include allergen immunotherapy. Please consult a doctor for a comprehensive evaluation.

Please be reassured that your prescribed treatment, including Levofloxacin (Levoflox 250), Rabeprazole (Rabedif), and Montelukast/Fexofenadine (Montair FX), is highly appropriate for a bilateral sinus infection. Since you only started yesterday, it is completely normal to not feel relief yet; antibiotics typically take 48 to 72 hours to show noticeable improvement, and full recovery can take one to two weeks. I recommend resting, staying hydrated, and using warm compresses. If you develop a high fever, severe eye swelling, or see no improvement after three full days, please contact your doctor or seek a second opinion.

Dizziness and headaches can be mild side effects of Montair FX (montelukast/fexofenadine) and Allegra (fexofenadine). Your cheek pain is likely due to the sinus inflammation itself rather than the medication. Regarding your blood test, slightly elevated eosinophils and monocytes are very common, natural immune responses to allergies or sinus infections. I recommend staying well-hydrated and consulting your prescribing doctor to review these lab results and your symptoms to ensure you are on the best path to recovery.

Since your current antihistamine and montelukast aren't fully clearing things up, we might consider cough-variant asthma or seasonal allergies with post-nasal drip, which can easily irritate your throat and airways during colder months. To help you feel better, your doctor might suggest adding an inhaled corticosteroid to reduce airway inflammation, or an intranasal corticosteroid spray to target the throat irritation at its source. A rescue bronchodilator inhaler can also help with any shortness of breath.

Sneezing, itching, and watery eyes can be lessened by antihistamine eye drops and oral antihistamines such as cetirizine or loratadine. Keep windows closed, stay away from allergens, and use a saline nasal spray to help clear your nose.