<s>[INST] I have a cough.  I have had it for more than a year... I am on Claritin and singular.  I have an inhaler just finished taking a weeks worth of prednisone.  I have had a ct scan and everything is fine.  Any suggestions email is  YYYY@YYYY Thanks, JoAnn [/INST] Hi, A cough can be caused by medicine, e.g. ACE inhibitors, so if you take these, try to stop for a while, alternatively try an angiotensin II antagonist. Gastroesophageal reflux may also give rise to a cough, so it could be relevant to do a gastroscopy. Furthermore, a bronchoscopy could also be indicated. Hope I have answered your query. Let me know if I can assist you further. </s>