Poisoning can occur through accidental or intentional means. Common causes include medication overdoses, food contamination, carbon monoxide inhalation, and insect bites or stings. Signs and symptoms vary depending on the type of poison but can include nausea, vomiting, diarrhea, dizziness, confusion and loss of consciousness. Treatment involves assessing airway, breathing and circulation, identifying the poison, administering activated charcoal or induced vomiting when appropriate, giving oxygen and antidotes if available, and providing supportive care to treat symptoms and prevent further complications. The goal is to limit absorption of the poison, enhance elimination, and support organ function until the toxic effects resolve.