<s>[INST] 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 only)2. Tussin cough & runny nose 3. claritin 4. cvs Loratadine 10 Mg Anyone can help please?Regards,Stella Hong ( YYYY@YYYY ) [/INST] 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 didn't 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. </s>