It may be a side effect of taking huge amounts of extract, but is not possible when consuming the leaves, as far as I know. I’ve known people who claim to take an ounce (28g) of leave per day without issue. (I take btw 2-8 grams in a day myself so I can’t speak to higher doses)
In general taking excessive amounts triggers vomiting, similar to when you eat too many psilocybin mushrooms (well, some say it’s ideal to vomit shroom-wise, but I’m not a fan). So mitragyna speciosa is incredibly safe.
Unfortunately Wikipedia’s treatment of the topic could be improved, but there is very little existing literature out there. I read one review study I was pretty happy with but I’m not on a laptop so i can’t go dig up the link unfortunately
I take a muscle relaxer that is non drowsy, yet it’s listed side effects include the same statements of drowsiness seen on all muscle relaxers. They slap the same side effects on drugs of the same class.
> They slap the same side effects on drugs of the same class
They spend billions on developing and promoting these, and they can't figure out the side effects for a specific drug? Maybe they should spend just a little bit more.
Somewhat true, but that's only part of the picture. An extremely significant distinction is that, much like with cannabis, it is pretty much physically impossible to overdose to death on mitragyna speciosa by itself. It will make you feel terrible to the point of being non-functional, but it almost certainly will not kill you.
So it’s a painkiller that works as well as an opiate with a maximum dose that dwarfs the opiates. Sheesh. That alone should be enough to research its use for pain management
Back when the potential kratom ban was scaring everyone, I remember seeing a sign advertising clinical trials for those dealing with opioid addiction. The cynic in me wondered whether the trials were for some medication that mimicked kratom or any individual alkaloid
It activates mu-opioid quite strongly but not the other receptors as much (I forget their names).
Interestingly, it has a mix of opioid antagonists and agonists. I’m not sure if that specifically is why tolerance doesn’t build aggressively, or if it’s some other MoA like nmda receptor antagonism
However it is true that drugs like heroin (when pure) are quite safe overall - aside from the respiratory depresssion overdose scenario.