allergic rhinitis
"Started to get post nasal drip horribly over four months ago. tried every otc drug know for allergies, remove bedroom carpet, bought high end humidifier, air purifier, netti potted and drank four liters of water a day. Nothing helped and i would wake up every hour and a half coughing from mucus build up. This medication stopped my symptoms within 2 days.

Its very expensive but worth every penny."