All of these are spot on! Alcohol poisoning, and some drug overdoses caught early generally involve charcoal ingestion by a nurse or dr. to induce vomiting. As a former health care professional the only thing we discouraged patients to do was stop diarrhea. Because generally diarrhea is trying to rid something from the small intestine. Unless the d is ongoing, many bouts of and with v, we would encourage patients not to take an anti diarrheal, because that then traps the bacteria in the intestine.