Drug Class	Description	Examples
Antidepressants	Used to treat major depression.	Desipramine Fluoxetine Sertraline
Antipsychotics	Also called major tranquilizers or neuroleptics. A group of drugs used primarily in the treatment of schizophrenia.	Chlorpromazine Haloperidol
Antimanics	Used to treat bipolar disorder (also known as manic depressive disorder).	Lithium Carbamazepine
Sedative-Hypnotics	These drugs depress behavior, moderate excitement, and induce calmness. They are used clinically as muscle relaxants, antiepileptics, preanesthetic medication, and antianxiety drugs.	Secobarbital Diazepam
Psychostimulants	A class of drugs that increase arousal, induce wakefulness and stimulate behavior.	Ampthetamine Cocaine
Psychedelics	A class of drugs that produce profound changes in perception.	LSD Psilocybin
Opiates	Because of their ability to profoundly suppress pain responsiveness, these drugs are used clinically as analgesics. They are also widely used outside the clinic for their reinforcing properties.	Heroin Morphine
Cannabinoids	The most notable cannabinoid is delta-9-tetrahydrocannabinol, the psychoactive substance in marijuana.	Marijuana
Ethanol	Ethanol is the alcohol in beer, wine and hard liquor, and is one of the most popular psychoactive drugs.	Beer Wine Liquor
Nicotine	Nicotine, a mild stimulant, is the psychoactive substance in the leaves of the tobacco plant.	Tobacco

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