hallucinogenic

And, perhaps most accurately, "a single complete experience of using a powerful hallucinogenic drug."

There they tried non-hallucinogenic 2-Bromo-LSD for chronic cluster headaches.

So Halpern suggested looking at a non-hallucinogenic 2-Bromo-LSD, instead of LSD.

Over-the-counter cough syrup may also be used, though the effects of that are more hallucinogenic than euphoric.

But the protagonist and the playwright are linked by hallucinogenic drugs.

Some had hallucinogenic effects, which were probably useful for pain.