Analysis of information sources in references of the Wikipedia article "阿片剂" in Chinese language version.
Opiate is the older term classically used in pharmacology to mean a drug derived from opium. Opioid, a more modern term, is used to designate all substances, both natural and synthetic, that bind to opioid receptors (including antagonists).
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缺少标题 (帮助) (PDF). Status and Trend Analysis of Illict(原文如此) Drug Markets. [26 June 2015]. (原始内容存档 (PDF)于2015-06-27).|chapterurl=
缺少标题 (帮助) (PDF). Status and Trend Analysis of Illict(原文如此) Drug Markets. [26 June 2015]. (原始内容存档 (PDF)于2015-06-27).