I'm a novice at this, but have a quick question.

At age 50, I developed a nasal drainage problem.  

The drainage goes down the back of my throat and a lot of it ends up
in my lungs.   I think I may have a defect in the mechanism that
should cause me to cough this drainage up BEFORE it enters my
chest/lungs.  I blame some of my health problems on this constant
liquid in my lungs and persistent cough.

So what I want to try is to just dry up my sinuses a little without
any other treatment.    

What medicine would I look for?