A narcotic drug similar to morphine. When used for medical purposes, it is generally known as diamorphine. Heroin is a white or brownish powder that can be smoked, sniffed, or dissolved in water and injected. As well as having an analgesic effect, heroin produces sensations of warmth, calmness, drowsiness, and a loss of concern for outside events. Long-term use of the drug causes tolerance and psychological and physical dependence (see drug dependence; heroin abuse). Sudden withdrawal produces shivering, abdominal cramps, diarrhoea, vomiting, and restlessness.
Heroin |
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