NSAID's as treatment

I have taken NASAIDS for about 15 years namely Nabumetone.   I was told I could take up to 4 a day initially but have never needed more than one.   After about 10years my GP asked me what happens if you stop taking them.   So I stopped to find out and was O.K. For about 6 months then I had to start again.  Basically this is how I go on now taking them as and when I need to.   Regarding side effect, they do affect my stomach and I have to visit the toilet more frequently than I otherwise might have to.  Also I occasionally feel very unsettled in my lower abdomen a sort of dull ache but when I eat it passes.    I now take Omneprazole to counteract the side effects.   At the end of the day it's better than having the pain I used to have.