Have had a lot of muscle and joint pain the last year. Doctor said due to stress. I workout a lot and have been in good shape most of my life. Was taking ibuprofen, Doctor put me on naproxen for pain, which works good. Most of the time I ve been taking elevators can t climb stairs because of knee pain. With this med still don t use stairs. But noticing that my stomach has be upset and I m very tired. Assum side affect of med. so thinking go back to taking ibuprofen.....6 a day. Doesn t help as much but don t have these side affects. Your thoughts?