My doctor prescribed ketoprofen (200mg extended release) for inflammation in my knee. There is arthritis in my knee, and I had a medial meniscus repair a couple of months ago, but there is pretty constant swelling on the anterior part of my knee at the base of the thigh/top of the knee that was present prior to the meniscus tear. In spite of the surgery and having the fluid drained twice, I still have pain and swelling. In addition to RICE, can I take an additional pain reliever?