This homeopathic remedy comes first alphabetically and first in effectiveness. This is almost always the first choice for food poisoning. It is also quite successful for people, and the results are usually dramatic. The patient needing this remedy will often have diarrhea and nausea or vomiting at the same time. They may be quite ill, even fearful that they are severely ill and may die, they may also be very restless. These are strong keynotes in the materia medica for choosing Arsenicum.