Predmet (Methylprednisolone) is a powerful corticosteroid used to quickly control inflammation, but it is not intended for lifelong use due to potential long-term side effects. The return of your knee pain and swelling indicates the underlying cause needs a definitive diagnosis and targeted, safer long-term therapy. Crucially, you should not stop taking this medication abruptly, as this can cause rebound symptoms and other health issues. Instead, consult your doctor to safely taper off this medicine under supervision and to discuss long-term management strategies tailored to your specific type of arthritis.