I am allergic to NSAIDS so when I have a severe pain, the only option is medrol dosepak. The last time I took it was for back pain 6 months ago. Now I have pain from my sciatic nerve for the past 3 weeks. Tried Flexeril and Tylenol all weekend and it didnt help much. Finally the Dr agree to the medrol dosepak. Why are Drs so reluctant to prescribe this at first?