FRCSC stands for Fellow of the Royal College of Surgeons of Canada. Suggest new definition. This definition appears very rarely and is found in the following Acronym Finder categories: 1  Organizations, NGOs, schools, universities, etc.
Naproxen Side Effects. Several different side effects can occur with the use of naproxen. Those that were most commonly reported in clinical trials included stomach pain, constipation, and drowsiness. People who use this pain-relief medicine may also have a higher risk of heart attack or stroke.
Stop using naproxen and call your doctor at once if you have: 1  shortness of breath (even with mild exertion); 2  swelling or rapid weight gain; 3  the first sign of any skin rash, no matter how mild; 4  signs of stomach bleeding - bloody or tarry stools, coughing up blood or vomit that looks like coffee grounds;