毒品 (dú pǐn) literally means 'poisonous substance' — 毒 (dú) means 'poison' or 'toxic', and 品 (pǐn) means 'substance', 'item', or 'product'. Together, the term specifically refers to illegal narcotics or controlled drugs such as heroin, cocaine, methamphetamine, and opium — substances prohibited by Chinese law due to their high potential for addiction, severe health damage, and social harm.

In modern Chinese usage, 毒品 carries strong negative connotations and is never used neutrally. It appears in formal contexts like legal documents, public health campaigns, news reports, and anti-drug education. Unlike the more general or clinical term 药物 (yàowù, 'medication'), 毒品 exclusively denotes illicit, dangerous substances — even prescription medications misused for intoxication may be classified as 毒品 under Chinese law.