Suspiciousness Induced by Four-Hour Intravenous Infusions of Cocaine: Preliminary Findings

Michael A. Sherer, Karen M. Kumor, Edward J. Cone, Jerome H. Jaffe

Research output: Contribution to journalArticlepeer-review

59 Scopus citations


Cocaine hydrochloride was administered to experienced users as an intravenous (IV) loading dose of 40 to 80 mg, followed by four-hour continuous IV infusions of either cocaine or placebo. Rates of cocaine infusion were individualized to maintain steady-state cocaine concentrations for the duration of the infusion. During the infusions, subjects rated themselves on questions that assessed their suspiciousness and paranoia, and nurse-observers took descriptive notes on the subjects' behavior; these notes were later scored on a scale for guarded, suspicious, and paranoid behavior. Nurses observed and rated moderately suspicious behavior when cocaine IV bolus loading doses were followed by cocaine infusions, but not when loading doses were followed by saline solution infusions; subjects did not rate themselves as suspicious during any of the study conditions. Suspiciousness during low-dose cocaine infusions significantly correlated with the amount of cocaine previously administered to the subjects. Suspiciousness during infusions was not related to plasma cocaine concentrations, preadmission drug use, or psychiatric symptoms and history. Cocaine infusions may be a useful tool to pursue the biology of stimulant psychoses.

Original languageEnglish (US)
Pages (from-to)673-677
Number of pages5
JournalArchives of general psychiatry
Issue number7
StatePublished - Jul 1988

ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Psychiatry and Mental health


Dive into the research topics of 'Suspiciousness Induced by Four-Hour Intravenous Infusions of Cocaine: Preliminary Findings'. Together they form a unique fingerprint.

Cite this