anticholinergic

That inhibits the physiological action of acetylcholine at a receptor site.

Any of a class of drugs, typically used to treat various disorders and some forms of poisoning, which inhibit the physiological action of acetylcholine at a receptor site.

While the hallucinations produced by jimsonweed and other anticholinergics are frequently described as frightening or even “nightmarish,” the toxic anticholinergic syndrome caused by jimsonweed can include seizures, CNS depression, respiratory failure, and cardiac abnormalities, all of which can be life-threatening.