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Science. 1978 Oct 13;202(4364):227-8.

Cocaine plasma concentration: relation to physiological and subjective effects in humans.

Abstract

Volunteer subjects with previous histories of cocaine use were administered cocaine hydrochloride intravenously or intranasally. There was a positive relationship between peak plasma concentration, physiological and subjective responses, and dose administered. The rate of cocaine disappearance after intravenous administration paralleled the drop in physiological and subjective drug effects. After intranasal administration, blood levels remained elevated for a considerably longer period.

PMID:
694530
[PubMed - indexed for MEDLINE]
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