Knee pain is treated with medications based on the cause. Common causes include synovitis, rheumatoid arthritis, meniscus injuries and so on. The drugs used for treatment are mainly anti-inflammatory drugs such as aspirin, drugs that nourish cartilage such as glucosamine hydrochloride and anti-rheumatic drugs such as cyclophosphamide. 1. Synovitis: Knee pain caused by this kind of disease can be treated with non-steroidal drugs such as meloxicam and celecoxib. At the same time, it can also be treated with drugs that nourish cartilage, such as glucosamine hydrochloride. 2. Rheumatoid arthritis: usually treated with a combination of anti-rheumatic drugs such as cyclophosphamide and glucocorticoids. 3. Meniscus injury: you can take oral anti-inflammatory drugs such as Nimesulide and Aspirin to relieve the pain, but it is still necessary to combine with physiotherapy or surgery to have better results. There may be other causes of knee pain, such as joint injury, fracture, etc. It is recommended to choose the appropriate medication to take according to the condition. The above medications need to be taken according to the doctor’s prescription.