Source:http://linkedlifedata.com/resource/umls/id/C0085163
MSH: 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.,CSP: cocaine which has been heated, purified, concentrated, and compressed into smokeable, pebble-sized crystals; highly abused and addictive.