Ive got prescribed Etoricoxib (arcoxia) by the doctor for my tentontitis and have done a little research on it it it sounds like it has alot of side effects. I have some Naproxen that i got a while back that i didnt take, my questian is should i use the Arcoxia which will be 90mg for 5 days or use the Naproxen will will be 1000mg for 2 weeks. Which will be the best and more effective. I also had some Omeprazole to protect the stomach.