Coming off pred, & other RA meds, for surgery on 6/19. Been on predfor a yr, at 2.5mg now. Hands, feet & hips hurt terribly. What can I do to help unti?

Adrenal suppression. Being on steroids for a year will suppression your adrenals, meaning they are not tuned up and capable of responding to surgical stress. Your concern is important and having a pre-operative visit with your regular doc/rheumatologise to discuss this issue will be important. Okay to discuss with your spine surgeon as well. You may benefit from stress steroids around your surgery. Good luck.
RA meds . As stated with adrenal suppression you can be miserable. See your rheumatologist for help .