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.
Because naproxen can increase your risk of major or life-threatening bleeding, contact your healthcare provider immediately if you notice any unusual bleeding or have any of the following symptoms: 1  Bloody nose. 2  Black, tarry stools. 3  Blood in the urine or stools. 4  Vomiting blood. 5  Red or purple spots on the skin.