Hi, Thanks for your question. I'm Dr. Hasan and I'll try to help you.
Since how long you have this?
What is colour of phlegm?
Do you have symptoms like nasal obstruction, nasal discharge, fluid trickling in throat, body aches, fever (if yes, how high? ) etc?
What are your diagnosed medical problems and on which medications you are on already
After getting this information, i can provide you a better guidance.