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.
Once swallowed, ibuprofen and naproxen are rapidly absorbed from the stomach and intestines. Depending on the amount of drug ingested, toxic effects can occur within an hour, but some signs can take a few days to appear. The most common side effect is stomach irritation. In mild cases, this may cause vomiting.