why would you cut back on serrapeptase if your body handles it.For serrapeptase to be successful for sinus you have to take a minimum of 60,000 iu a day.I took 120,000 iu a day, some may need even more.These suplements worked wonders for me.I have zero sinus issues.The taste in your mouth could be the serrapeptase braking down mucus in your throat.once you get to the dosage that your body needs that will clear up about a week after that.I took 120,000 iu of serrapeptase for 2 months and know I take one 60,000 once a day.
You should also look at the possibility of having gerd.Some people have gerd without the classic symtoms.You could have acid backing straight into your nasal cavity from your stomach which causes your body to produce mucus to protect itself from the acid.The reason I say this ,is you say it gets bad when you drink alcohol,alcohol relaxs the cardiac spincter allowing acid to back up.
just a thought