I took a course for about a month for incredibly painful feet (plantar fasciitis). During that time I had what I can only describe as an intermittent low level ache in my stomach. When I finished the course the pain came back in my feet so the dr put me on another course.
I didn't really link the naproxen with the stomach ache at first but I'm fairly certain it stopped when I finished the first course. Now I'm on a second course I'm getting it every day - worse on an afternoon and it's currently happening every day without fail. It's not a pain, just a dull ache. I think I'm going to have to knock the Naproxen on the head and see if my stomach improves. But I wondered if anyone else had had similar side effects? I've been taking omeprozole as well which I understand protects the stomach.