I'm not a doctor, nor do I have medical education..it's my experience with mucus, in my sinus area mostly, throat is better now..
I take Mucinex DM, over the counter...it thins the mucus...one in the a.m. and one at nite...12hrs. apart.
Also, get yourself a "NEIL MED" netipot..(miracle item for me)
DOOOOOOOO NOT USE TAP WATER FOR NETI POT, NEVER!!!...that's a deadly mistake..even if your feel your tap water is safe, don't risk it.