A chemical substance that affects the processes of the mind or body; a substance used in the diagnosis, treatment, or prevention of a disease; a substance used recreationally for its effects on the mind or body, such as a narcotic or hallucinogen

Physiological need for a drug that has been brought about by its regular use; dependence is characterized by withdrawal sickness when administration of the drug is abruptly stopped

A poisonous substance naturally produced by certain plants, animals, and bacteria that is capable of causing disease or death in humans; a subgroup of poisons

Promotes muscle growth

A means of separating and tentatively identifying the components of a mixture

A drug or other chemical compound whose manufacture, distribution, possession, and use is regulated by the legal system

A substance that induces changes in mood, attitude, thought processes, and perceptions

molecules that do not contain carbon.

Tests to identify specific substances by the color and morphology of the crystals formed when the substance is mixed with specific reagents

A naturally occurring or manufactured substance that can cause severe harm or death if ingested, inhaled, or absorbed through the skin

A substance taken to increase alertness or activity

An addictive drug, such as opium, that relieves pain, alters mood and behavior, and causes sleep or feelings of mental numbness

A naturally occurring substance that can cause severe harm or death if injected through the skin