An emetic is an agent that induces vomiting by irritating the gastrointestinal tract (direct emetic) or stimulating the trigger zone of the central nervous system (indirect emetic). Emetic properties are very unwanted side effects of some drugs, especially those for pain and chemotherapy.

Emetics are often abused by bulemics, but such abuse will lead to muscle damage.

Emetics were once commonly used as first aid in cases of poisoning, and many deadly poisons (such as rat poison) are mixed with an emetic in the case of accidental ingestion. However, in most cases, it is inappropriate to induce vomiting in a poisoning patient and, instead, emergency medical care should be sought immediately.

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