Thanks for your question.
It is a condition where mucus keeps dropping into the throat from the sinuses around our nasal area.
It can be quite irritating leading to cough.
Since how long have you been having these symptoms?
Any other medicine you may have used?
Thanks for the reply.
Couple of possible caused would need to be looked into.
One possible cause is allergic rhinitis.Mast cell stabiliser like Montekulast would be helpful in this condition.
Other possible cause is gastro esophageal reflux.In that case proton pump inhibitors like Nexium would help.You need to discuss these possible causes and treatments with your doctor.