I am doubting this is any heart-related problem, but GI upset secondary to the Naprosyn. Perhaps you can try another NSAID, i.e. Ibuprofen. Are you taking the Naprosyn with food and water?
Yup, I'm taking it with food and water. I'm taking the Naprosyn for a pretty specific reason but I could possibly ask my doc for another option.
NSAIDs are fairly interchangable. Ibuprofen will work just a well as Naprosyn for most things, but may be better suited to you
Ask for another option then.
I know I have taken Aleve in the past and it does a number on my stomach where as Motrin is easier on my stomach.
As belladonna99 has pointed out they are fairly interchangeable; NSAIDS.