It makes sense to try and keep vital organs in decent shape for as long as possible - that's a complication you can do without!

Its possible you may find the opioid/narcotic drugs (which is what you mean when you say pain relievers, right?) are more effective for the pain if you take them continuously rather than ad hoc. The ones that are delivered through the skin by means of a patch can be easier to live with (plus you don't need to remember to take them every day).

There was a press release just last week or the week before about a reasonably interesting study done in Oxford, UK looking at the mechanisms of how THC/cannabis is believed to work to manage pain. I don't have a reference and I suspect only the abstract would be available free of charge anyway but it was widely reported on The BBC news website and some of the major newspapers in the UK if you are interested in searching for it. I'm sure that would take you to the official published abstract or full text. Everything I've read has tallied with your findings, namely that it seems to have pretty mixed results for CRPS.