... to 60 mg. I was on that for about a week and went to 40 mg. I was on 40 mg a day for years. It took 12 years to taper down. I had Linear IgA Bullous Dermatosis. I started in Nov. 1992 and quit in July 2005. I'm experiencing osteoarthritis and lower back pain without injury. My bone structure feels week. Is this the result from long term prednisone use?