How Can Severe Backache And Osteoporosis Be Treated?

My mom is almost 85 years old and has had past back surgery for bulging disks (2005), has spinal stenosis, arthritis, and osteoporosis. She has severe back pain--mostly on the right buttocks area. In the past, she has had epidurals which led to nerve damage in her leg and an infection from another such epidural. She uses a walker and can still walk short distances. I have asked her doctor to give her a prednisone shot every so often (which he has done), but the last visit he gave her an oral dose and she vomited (she does not tolerate a lot of oral meds), but is also on Eloquis blood thinner to avoid clots due to afib which is under control. Other than this, she is pretty healthy, has maintained her weight, and has a good appetite. Is there a possible option for her? I don t want her to undergo a major surgery, nor does she. Thank you.