<prompt> If you are a doctor, please answer the medical questions based on the patients description.Hello, my 15 year old son is suffering from runny nose for about a month now, we have tried about 2 different kind of allergy medicine and 2 different kinds of cough runny nose medicine, nothing seems to be working so far. Following are the list of the medicine that he s tried in the order of application.. 1. Delsym cough when it started from cough only2. Tussin cough runny nose 3. claritin 4. cvs Loratadine 10 Mg Anyone can help please?Regards,Stella Hong YYYYYY  <response>: Thanks for posting your query to Chat Doctor. No need to worry as I understand it could be an allergic in origin but as you didnt get benefited from medication we need to go for some investigation. I suggest you some test to confirm our diagnosis:1. Complete blood count 2. X-ray paranasal sinuses.Please provide me details of followings ;Is there history of allergic in family .2.Does your child suffer from same earlier 3.is this complaint associated with cough fever body ache rash on any part of body redness of eye difficulty in breathing foreign body sensation in nasal cavity pain in ear difficulty in hearing.after getting all this detail I would be able to guide you complete treatment . Presently you can start 1. Levocetrizin10mg with Montelukast 5 mg once in a day .take care and feel free to contact. 