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.
Just like any drug, naproxen has the potential to cause serious side effects. The U.S. Food and Drug Administration (FDA) warns that people using nonsteroidal anti-inflammatory drugs (NSAIDs) other than aspirin, including naproxen, may have a higher risk of heart attack or stroke than those who do not take NSAIDs.