banned drug; prohibited substance
Refers to drugs or substances that are legally prohibited, often in sports, medicine, or law enforcement contexts.
The athlete was disqualified for using a banned drug.
Banned drugs were seized at customs.
違法薬物 emphasizes illegality under general law, while 禁止薬物 often refers to substances banned by specific regulations (e.g., sports anti-doping rules).
Compound of 禁止 (kinshi, 'prohibition') and 薬物 (yakubutsu, 'drug, chemical substance').