I had CRPS and am currently in remission. I was able to get an early diagnosis
and treatment via stellate ganglion blocks and very vigorous physical therapy.
Generally, nerve blocks are only effective in the first six months of the syndrome,
so I am assuming your sister has tried this therapy and failed. The spinal stimulators
are the second line of therapy. I have no personal experience with them, but
I used to belong to a very helpful online group of CRPS sufferers. The general
consensus is that they work for a short time and then don't work anymore.
There are more aggressive treatments than spinal stimulators. Google up Ketamine
treatment or ETC treatment for CRPS. You can also look at spinal delivery of small
dose narcotics to keep the pain at bay.
Basically, there is no limit in PO narcotics. It all revolves around opiate tolerance.
The best way you can support your sister is realize her pain IS real and believe
in her. The pain is just horrible 24/7 with no relief. These pts are some of the
most depressed population you will ever see. Suicide is a real option to them to
stop the pain. The judgment she sees as a "drug seeker" is also a problem and
further plunges a pt into depression.
*Not medical advice. Been there and done that - few people have. Tell your sister
to have some hope. I am at least one person that's in remission!