Heroin

**Definition:** A narcotic analgesic that may be habit-forming. It is a controlled substance (opium derivative) listed in the U.S. Code of Federal Regulations, Title 21 Parts 329.1, 1308.11 (1987). Sale is forbidden in the United States by Federal statute. (Merck Index, 11th ed)

**Tree numbers:** - D03.132.577.249.562.445 - D03.605.497.607.490 - D03.633.400.686.607.490 - D04.615.723.795.576.445

**Synonyms:** - Diacetylmorphine - Diamorphine