Final answer:
Cocaine is the substance that is not typically classified as a hallucinogen, psychedelic, or psychomimetic. LSD and psilocybin are classic hallucinogens, while MDMA can have some hallucinogenic effects but is primarily known as an empathogen.
Step-by-step explanation:
The substance that is NOT typically classified as a hallucinogen, psychedelic, or psychomimetic among the options provided is cocaine. LSD (d-lysergic acid diethylamide) and psilocybin (from magic mushrooms) are classic hallucinogens that cause perceptual changes and are serotonin agonists. MDMA (3,4-Methylenedioxymethamphetamine), often known as ecstasy, can have stimulant or hallucinogenic effects, but is also known as an empathogen, leading to feelings of empathy among users.
While MDMA does have some properties that could be described as psychedelic at high doses, its primary classification is not as a hallucinogen but as an empathogen. Cocaine, on the other hand, is a potent stimulant that affects the central nervous system by increasing levels of dopamine in brain circuits that regulate pleasure and movement, but does not primarily cause hallucinations or perceptual anomalies.