Different names for the same type of medication. These are drugs with an extremely wide range of uses in almost all areas of medicine. They work best for weight loss, speeding up metabolism. The drugs are even used in urology (against problems with urinary retention) and cardiology (slowing down heart rate).
https://en.wikipedia.org/wiki/Acetylcholinesterase_inhibitor
https://www.adcc.sk/web/humanne-lieky/atc-skupiny/n07a/parasympatomimetika.html
https://www.adcc.sk/web/humanne-lieky/atc-skupiny/n06da/anticholinesterazy.html
Muscarine works on a very similar principle to the acetylcholinesterase inhibitor. Muscarine is not a poison but a drug. But every drug also has a lethal dose. I highly recommend mushrooms containing muscarine for weight loss, it won't harm your body.
https://en.wikipedia.org/wiki/Muscarinic_agonist
https://en.wikipedia.org/wiki/Muscarine