Hi there.
Arthritic Knee can be a major hindrance to daily activities.
Naproxen belongs to a class of drugs known as NSAIDS. They have more or less a similar side effect profile and amongst them Naproxen is supposedly safer than others.
Having said that i won't recommend it on a daily basis. You can take it for a week just to tide over the crisis. I suggest you take an extended action
Paracetamol like Lanol ER or any similar combination along with Naproxen for added coverage. Paracetamol is safer on the long run.
After a week try using Paracetamol extended release only and see how the pain is. If it doesn't work Ultracet(a combination of Paracetamol and
Tramadol which is an
opioid) might help and is safer on the long run. On bad days you can take an additional Naproxen to help with the pain.
What helps along with medication is
Physiotherapy to strengthen the Quadriceps muscles which takes a
stress off your knee joints. Especially oblique fibres of
Vastus medialis.
Either consult a physiotherapist to help and teach you these specific exercises or try finding them on the Internet. I cannot stress enough the long term benefits of physiotherapy as when started at the right time and done correctly can slow down joint degeneration and on the long term works wonders.
Hope this helps.