1 Vomiting: The simplest way is to press down half of your tongue with chopsticks or tongue depressor to spit out the unabsorbed food residue in your stomach. If the food is sticky, you can drink a lot of water first, then induce vomiting and spit out the toxic food left in your stomach;

2. Gastric lavage: water or sodium bicarbonate is injected through the indwelling gastric tube, and different gastric lavage fluids are selected for gastric lavage according to the types of poisoned food. Generally, gastric lavage will be repeated until the stomach contents are completely washed. Timely examination of the contents of the stomach after washing is helpful to identify the toxins of food poisoning and find an effective antidote.

3, catharsis: magnesium sulfate can be used to catharsis and discharge toxic substances in the gastrointestinal tract. If first aid can be given outside the hospital, the hospital can purify the blood at the bedside and absorb the toxins in the blood;

4, taking drugs: through special antidote, such as organophosphorus poisoning, iodophor, chlorophyllin, alcoholism, naloxone and so on. Relieve the symptoms of poisoning.