I stopped taking prescription naproxen to see if was the cause of easy bruising. have been off 3 weeks, is that long enough to tell? still btuising

Time to see Dr: Yes, plenty long enough, and not likely the source of problem (but not impossible). Need seen by your Dr for good history and evaluation as to likely source(-s) of the easy bruising in case it is something more serious than a 'case of the clumsy.' Good luck!

Yes: 3 weeks is enough time. Your bruising may be due to other reasons, most commonly platelet issues or liver dysfunction. I would recommend following up with your primary care doctor for further evaluation , and to rule out any other possible serious conditions that can cause bruising.