Hannah,
Crap! I'm sorry to hear this. I'm already on a small dose of MS Contin for back pain from degenerative disk disease, so I have not noticed an increase of pain in any joints.
I did have two episodes of pain/ache in lower back on side, but away from any joints. It was similar to muscle type strain. One lasted over a week. One just a few days.
I sincerely hope your sister can get this resolved with a pain med that she can tolerate, soon!
hugs to you both,
pattyz
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