I'm sorry to hear that your runny nose has persisted despite treatment; that can be quite frustrating. Since you have already tried Fexofenadine (an antihistamine) combined with Montelukast (a leukotriene receptor antagonist) without relief, it suggests that your symptoms might not be fully controlled by these medications alone.

Here are some steps you can consider:

• Re-evaluation by an ENT (Ear, Nose, and Throat) specialist: Persistent runny nose can be due to various causes such as allergic rhinitis, non-allergic rhinitis, sinus infections, nasal polyps, or other underlying issues. A specialist can perform a thorough examination and may recommend further tests like nasal endoscopy or allergy testing.

• Nasal corticosteroid sprays: These are often effective in reducing nasal inflammation and runny nose, especially if allergies or chronic rhinitis are involved. They are different from oral antihistamines and may provide better symptom control.

• Avoid known triggers: If allergies are suspected, try to identify and avoid allergens such as dust, pollen, pet dander, or strong odors.

• Saline nasal irrigation: Using a saline nasal spray or rinse can help clear nasal passages and reduce irritation.

• Review current medications: Sometimes, medications like decongestants or other allergy treatments may be added or adjusted by your doctor.

Since your symptoms have lasted for two months and initial treatment was ineffective, I strongly recommend consulting an ENT specialist for a detailed evaluation and personalized treatment plan.

If symptoms worsen or you develop additional signs like facial pain, fever, or difficulty breathing, seek medical attention promptly.To narrow down potential causes, we will need some more information.Please tell me your age and gender. I understand you've been dealing with a runny nose for two months and haven't found relief yet.