The cactus with thorns is nontoxic, but the wild cactus without thorns is toxic. This is because some wild cacti contain toxic alkaloids. Eating wild cactus will cause toxicity to the eater. These substances have a hallucinogenic anesthetic effect on human nerves. Serious and even life-threatening. Most cacti are harmless to human body.

Extended data:

Shenzhen Huanggang Customs seized five consecutive cases of bringing "prickly cactus" into the country. According to the notification from Shenzhen Customs, the succulent plant Cynanchum auriculatum contains hallucinogenic alkaloids, which can cause hallucinations, mental confusion and even life-threatening.

The silver crown jade intercepted by Huanggang Customs in Shenzhen is a Acanthaceae plant, native to western North America. This genus contains an alkaloid called muscarinic, so it is also called poisonous cactus by succulent lovers. After taking this alkaloid, it will temporarily affect people's hearing and visual feelings, resulting in hallucinations. It is a botanical hallucinogenic drug, and excessive or long-term intake is indeed very risky.

China News Network-Can succulents hallucinate? Experts say: Only a few are poisonous.