Interesting by the way that you still have a capability of getting the pain without having a gall-bladder, do you have any explanation to the mechanism behind that maybe?
Sorry for not replying to this, I forgot. Yes, there are two explanations which I believe could work in tandem to produce this effect. Firstly, pro-spasmodic effects - exhibited as ketamine is metabolized from your system - affects the smooth muscle of all biliary ducts, not just the ones leading to and from the gall-bladder. When the gall-bladder is removed, there is still a fully functioning network of biliary ducts leading from the liver in to the small intestine. It is these ducts which become inflamed and prone to spasms. Although the bile no longer sits in a reservoir, the smooth muscle walls of the biliary ducts are just as prone to inflammation and spasm as the gall-bladder.
Secondly, there is the issue of phantom pain. After I had my gall-bladder removed, I told a doctor friend of mine in passing conversation that there was still occasional pain in that region. He informed me that it is actually possible to have phantom pain from an organ removal, and that that is what he believed it to be. Apparently phantom gall-bladder pain is a common complaint amongst those who have had the procedure, and is not necessarily attributable to damaged nerves.
In light of this, it seems there is also a link with ketamine, since ketamine is actually very good at supressing phantom pain in amputees. I think it would be fair reasoning to hypothesize that phantom gall-bladder pain (rebound pain) could be triggered as the drug leaves the system, especially if there is infammation to that region via the inflammatory effects of the ketmaine being metabolized to norketamine.
Just to be clear, the pro-spamodic effects occur as the ketamine
leaves your system, since ketamine is actually a spasmolytic (in that it reduces the contraction of smooth muscle). That is why taking more ketamine makes the pain go away.
About the MSM helping with your k-cramps: very interesting indeed. I haven't researched that compound very well, so it would be interesting to hear an explanation as to how that is working.