Knee osteoarthritis is one of the most common causes of chronic pain and disability worldwide, particularly in middle-aged and elderly populations. It is characterised by progressive cartilage degeneration, subchondral bone remodelling, and synovial inflammation.
There were many trails to provide pain relief by using systemic opioids or Non steroidal anti inflammatory drugs (with side effects such as peptic ulcer and hepatic, renal impairment)