Final answer:
The substance from the list that is not a hallucinogen is Methamphetamine, a powerful stimulant, whereas LSD and PCP are known hallucinogens.
Step-by-step explanation:
The compound that is NOT considered a hallucinogen from the provided options is Methamphetamine. Hallucinogens are a class of psychoactive drugs that notably alter perceptions, thoughts, and emotions, often causing hallucinations. These include substances such as LSD (d-lysergic acid diethylamide) and PCP (Phencyclidine). On the other hand, Methamphetamine is primarily a powerful central nervous system stimulant and does not typically cause hallucinations. Steroids, also mentioned in the options, are not hallucinogens either; instead, they are a class of synthetic compounds that resemble the natural hormones produced by the body.