I take several meds with dry mouth side effect: Trazodone, Sertraline, Ec naproxyn, lovastatin, Exforge HCT, omaprazole, Theralith XR, calcium citrate, Slow Niacin, B complex, multi-vitamin, Metformin. Was doing fine then dry mouth started. I have tried stopping each of them but still have dry mouth. What should I do next? My doctor is stumped.