hallucinogen; psychedelic drug
A substance that causes hallucinations. Often used in medical, legal, or drug-education contexts. The synonym 幻覚剤 is also common.
See also: 幻覚剤
The use of hallucinogens is prohibited by law.
彼は幻覚薬の危険性について講演した。
He gave a lecture on the dangers of psychedelic drugs.