Someone who has swallow poison should be giving water

Find out what poison has been ingested. NEVER induce vomiting if the victim has swallowed a corrosive poison. A corrosive poison is a strong acid or alkali (base) such as dinoseb (DN Compounds). The victim will complain of severe pain and have signs of severe mouth and throat burns. A corrosive poison wil burn the throat and mouth as severely coming up as it did going down.

Most labels on emulsifiable concentrate and solution formulations suggest the victim should not have vomiting induced. However, when the toxicity of the pesticide is marked, its removal may be essential.