From 22 of february I stated having cold and flu after that it have been upto till date since I am using voice to get cough relief. Basically I am not able to sleep during nights. And having dry cough followed by a great urge to clear throat. This cough starts at night and from 9-12 and in morning from 8-10. What to do. please suggest. I have taken monteklc for 21 days still no relief. I am a microbiologist by profession. And have donated blood on 3 march have not disease or allergies kindly help.