The classes of drugs include Alcohol Caffeine Cannabis and synthetic cannabinoids Hallucinogens (eg, LSD, phencyclidine, psilocybin, 3, 4-methyl​enedioxy​ methamphetamine [MDMA]) Inhalants (volatile hydrocarbons [eg, paint thinner, certain glues]) Opioids (eg, fentanyl, morphine, oxycodone) Sedatives, hypnotics, and anxiolytics (eg, lorazepam, secobarbital) Stimulants (eg, amphetamines, cocaine) Tobacco Other (eg, anabolic steroids) This classification is not based on whether a drug is legal (eg, alcohol, caffeine), illegal (eg, hallucinogens), or available by prescription (eg, morphine, lorazepam).