Drinex (Oral)

I am unable to get drinex at my Pharmacy in Lecompte, La. I have been buying it there for

years, even before it was over the counter . My doctor use to give me a perscription to get it.

This is the only medecine that clears up our sinus(whole family uses it) Can you tell me where

I can purchase it. I would appreciate your help. Thank You Claudin