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 a non-steroidal anti-inflammatory drug (or NSAID) that is used to treat pain and inflammation. The most common side effects of naproxen are heartburn, abdominal pain, nausea, constipation, headache, dizziness, drowsiness, itching, skin rashes, ringing of the ears, swelling, and shortness of breath.: Naproxen (Naprosyn) is a non-steroidal anti-inflammatory drug (NSAID) that blocks substances in the body that normally cause pain and inflammation. Naproxen is indicated for pain associated with headache, cramps, and other pain.