Hi,
I can't help you with supplements or medicine and there are already 2 replies on that. I can offer some information on beneficial foods and herbs you can try to incorporate into your diet.
Guava:
Guava contains more lypocene (an antioxidant) than any other fruit or vegetable. Lypocene protects the body against free radicals. Free radicals can cause joint deterioration.
Turmeric:
"One of turmeric's many traditional uses has been for the treatment of arthritis, because of its ability to lower inflammation. In one study, curcumin [principle curcuminoid in turmeric] was found to be virtually as effective as the anti-inflammatory medication phenyllbutazone. It's been used in India to relieve arthritis, and can be useful for muscle pains as well as joint inflammation and even carpal tunnel syndrome."
150 Healthiest Foods on Earth, pg 292
Oil of oregano:
Because of its anti-inflammatory properties it alleviates joint inflammation.
Pictures taken from google images, quote taken from
150 Healthiest Foods on Earth by Jonny Bowden, Ph.D, C.N.S.
PS- I am still recovering from a broken leg so I feel you on the lower body joint and tendon pain. It's something I'm having to deal with as well. Good luck.