Intra-articular injections of sodium vitreous acid are used for early or early to mid-stage arthritis and have a more pronounced effect. The entire course of treatment is 1 injection per week, usually 3-5 injections, with a maximum of 5 injections. However, the number of injections required is determined by observing the symptoms of the knee joint within 1 week after each injection. If the arthritis is mild and the joint pain disappears after one injection, there is no need for further injections. If the relief is not obvious, a second injection can be given, but in any case, after 5 injections, no more injections can be given. This proves that intra-articular injections of sodium vitreous acid are not effective for this type of arthritis and other treatments are needed. Therefore, it is important to keep in good contact with your doctor throughout the treatment process to determine changes in symptoms and to choose other treatment options if necessary.