hallucinogen• The venom of many snakes, especially cobras, acts as a hallucinogen, producing ecstaticvisions.• LSD is a dangeroushallucinogen.• Don't touchdumbhallucinogens like A. Listen to your Ma and Pa, and forget the headster time ever happened.• It was some kind of hallucinogen, wasn't it?• The mushrooms themselves are only as harmful as most other hallucinogens.• Cowan says it is possible that the hallucinogens act by depressing one of these groups of cells.• As a repentantsinner I pledge to swear off this hallucinogen.• Everyone she knew smoked marijuana, and many tried hallucinogens, too.