ethnobotanical compounds are classifi ed as “hallucinogens,” of which Salvia divinorum  and
jimsonweed are two examples. Excluded from the hallucinogen group are cannabis and its
active compound, delta-9-tetrahydrocannabino l (THC) (see the section “Cannabis-Related
Disorders”). These substances can have hallucinogenic effects but are diagnosed separately
because of significant differences in their psychological and behavioral effects.
Hallucinogens are usually taken orally, al though some forms are smoked (e.g., DMT,
salvia) or (rarely) taken intranasally or by in jection (e.g., ecstasy). Duration of effects varies