It sounds like you have severe allergic rhinitis that is not responding to your current medicines. Dry mouth and worsening symptoms may occur with some nasal sprays or antihistamines. You should see an ENT specialist or allergist for a proper review; they may recommend a stronger or different nasal steroid spray, antihistamines, or allergy testing to find triggers. In the meantime, try saline nasal rinses, keeping your environment dust-free, and using a humidifier to ease congestion and itching.

If you have had a cold for a year, you can try medicines like cetirizine, loratadine, or a nasal spray instead of Allegra M or Alerfix. Saline water rinsing also helps. But you should consult your doctor to find the exact cause and proper treatment.

If your runny nose has lasted two months and Fexofenadine with Montelukast did not help, it may be allergic, sinus-related, or due to another underlying cause. You can try a saline nasal spray or rinse to clear the nose and reduce irritation. See an ENT or allergy specialist; they may suggest treatments to get effective relief.

Your eosinophil count is mildly high, which usually happens due to allergies. Since you have sneezing and a runny nose and feel better with Allegra-M, this is likely allergic rhinitis. You can continue using Allegra-M when needed, and use a saline nasal spray to keep your nose clear. Avoiding dust, cold air, and strong smells also helps. If it does not improve, consult a doctor.