I have terrible shaking of hands after 3 weeks of taking prednisone. how long will this last?

I feel for you. Ithe happened to me too. Perhaps your nurse will help. The med helped me so much I just had to live with it until I gave up because of muscle tension. In months it didn't stop. I am not you, though. I still have my last pills and doubt I can overcome the distaste this gave me for prednisone. Perhaps your doctor can help you avoid overexposure and take a break between regimens. Good luck and be well.