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.
A: Naproxen is in a group of drugs called nonsteroidal anti-inflammatory drugs (NSAIDs). It works by reducing hormones that cause inflammation and pain in the body and is used to treat conditions such as arthritis. Common side effects of naproxen include dizziness, drowsiness, stomach upset, mild heartburn, and rash.