The purified, alkaloidal, extra-potent form of cocaine. It is smoked (free-based), injected intravenously, and orally ingested. Use of crack results in alterations in function of the cardiovascular system, the autonomic nervous system, the central nervous system, and the gastrointestinal system. The slang term crack was derived from the crackling sound made upon igniting of this form of cocaine for smoking.
    

concept

Cocaine : gay men, sex and drugs / Terrence Higgins Trust.

Drugs. (1), Cocaine, crack, heroin, LSD / TACADE.

Crack / M. Foster Olive ; consulting editor, David J. Triggle.

The crack report / Turning Point.

High Society : mind-altering drugs in history and culture : free exhibition, 11 November - 27 February / Wellcome Collection.

Cocaine in America / David E. Smith, Donald R. Wesson and Nancy A. Eiswirth.

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Crack (Drug)

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Drugs. (1), Cocaine, crack, heroin, LSD / TACADE.

Crack / M. Foster Olive ; consulting editor, David J. Triggle.

The crack report / Turning Point.

High Society : mind-altering drugs in history and culture : free exhibition, 11 November - 27 February / Wellcome Collection.

Cocaine in America / David E. Smith, Donald R. Wesson and Nancy A. Eiswirth.