The Yellow Flower Bitter Evening Vine, also known as the broken intestines, also known as the big tea medicine, contains the highly toxic huperzine, which is poisonous. Because the intestines will become black cemented after the intestines of the broken intestine grass will be taken, people will die of abdominal pain and so on and so forth. The herb is not a kind of grass, but a generic name for a group of plants.

Broken Intestine Grass is famous since ancient times, but it is not the so-called strangulation of intestines. Rather, it is because it contains hookerin that can inhibit the victim's central nervous system, causing the poisoned person to have weakness in the limbs, slurred speech, double vision, vomiting and diarrhea, abdominal pain, and ultimately die of respiratory paralysis after 4-7 hours of poisoning.

The general antidote is to wash the stomach, take charcoal ash, then alkaline water and emetic, after washing the stomach with mung beans, honeysuckle and licorice sharp decoction can be taken to detoxify. In addition if these are not available, the victim can be given some goose blood, duck blood, sheep blood, will have a little slowing effect.