Have seen my nurse practitioner on Sept 8 and she recommended QNasl and Zyrtec for post nasal drip. When I speak, my voice is fine. When I sing, depending on the day, sometimes in the lower ranges, sometimes in the higher ranges (today I can t reach high notes--am not straining--I stop singing), I experience a buzzing sound in my throat. I m used to a clear voice. I also have a great deal of phlegm. Am thinking I should consult an ENT doctor.