First off, what is the prescription, I suspect it’s an NSAID. Also, if anything I say contradicts you doc, go with the doc.
There’s probably more than 1 therapy, but I give you what works for me. First off, you cannot keep aggravating it or it won’t go away. Typically, if I do everything right it will go away in about 6 weeks. If I feel any real pain working out, then the process starts over. This is why it sometimes won’t go away. Shoulder and elbo tendonitis is easier in that you can work around it. With knees there doesn’t seem to be a way to do that which makes it especially frustrating.
Secondly, you need to keep working it. So you need a middle ground where you can work it without aggravating it. Do not work thru the pain. Start by warming up with something extremely light, then go on to sets of 10 or more reps. Don’t go under 10 reps until you’re positive you’re over it, because if you’re feeling better, you’re still risking damage. When I screwed up my knees I started my rehab with just a light stationary bike work out. Do whatever it takes to work it without real pain. Also, unless your doctor said otherwise, don’t take any pain reliever, including Cissus before the workout. You’ll mask the pain causing further damage.
If you’re running stop and do a stationary bike or something low impact.
Supplements like glucosamine/chondroitin, omega 3’s and/or cissus can help, but it’s the therapy that makes the most difference.
Good luck