noun
Refers to the illegal trade of drugs; a formal or news-reporting term.
警察は薬物密売の疑いで男を逮捕した。
The police arrested a man on suspicion of drug trafficking.
More specific, referring to narcotics trafficking, while 薬物密売 is a broader term for illegal drug trade.
Compound of 薬物 (drug) and 密売 (illegal selling).