What are your symptoms apart from post nasal drip?
Do you have running nose, sneezing, blocked/congested nose, cough, facial pain or heaviness?
Do you have burning sensation in throat or chest, burping, bitter taste in the mouth?
Do you snore or sleep with your mouth open? Do you have other health issues for which you are on medication? Do you smoke?
Did you take all the above medications continuously, or with breaks?
Next Steps
Respond with the answers, or better, consult online.