- Therapeutic agent; any substance, other than food, used in the prevention, diagnosis, alleviation, treatment, or cure of disease. For types or classifications of drugs, see the specific name.
- To administer or take a drug, usually implying an overly large quantity or a narcotic.
- General term for any substance, stimulating or depressing, that can be habituating or addictive, especially a narcotic.
See Also: agent
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