Was up to a few weeks ago and yes and yes. Normally from bending down and standing up quickly but Nortriptyline did that as well. If it does upset your stomach go back to the doctors and they give you something to take with it.
Mate at work was diagnosed with Colitis this year and has took Naproxen on and off for a bad back and the first thing the specialist said was to immediately stop taking Naproxen and under no circumstances to take it again. Mate said the specialist just said it is evil on the stomach.
I was taking it for tennis elbow which it didn’t seem to help but nor has the cortisone injection.