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Related Experiment Videos

Nimodipine improves information processing in substance abusers

R I Herning1, X Guo, W R Lange

  • 1Molecular Neuropsychiatry Section, National Institutes of Health, National Institute on Drug Abuse, Baltimore, Maryland 21224, USA.

Annals of the New York Academy of Sciences
|September 15, 1995
PubMed
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Nimodipine may improve cognitive function in drug abusers. A 30-mg dose of nimodipine prevented decreases in brainwave activity (P3 component) during cognitive tasks, suggesting potential benefits for substance abuse treatment.

Area of Science:

  • Neuroscience
  • Psychopharmacology
  • Cognitive Science

Background:

  • Substance abuse is associated with cognitive deficits, particularly in information processing.
  • Event-related potential (ERP) methodology offers insights into the neural mechanisms underlying cognitive function.
  • Nimodipine, a calcium channel blocker, has shown potential in improving cognitive function.

Purpose of the Study:

  • To investigate the effects of nimodipine on cognitive information processing in healthy drug abusers.
  • To assess nimodipine's impact on the P3 component of event-related potentials (ERPs) during cognitive tasks.

Main Methods:

  • A randomized, double-blind, placebo-controlled study involving twelve male subjects with a history of substance abuse.
  • Administration of placebo, 30-mg, and 60-mg doses of nimodipine on separate days.

Related Experiment Videos

  • Performance of auditory rare event monitoring (AREM) and visual continuous performance tasks (CPT) with electroencephalogram (EEG) recording.
  • Analysis of the P3 component of ERPs at various time points post-drug administration.

    • Main Results:

    • A decrease in the P3 component amplitude was observed with repeated testing on placebo.
    • The 30-mg dose of nimodipine effectively blocked this decrease in P3 amplitude during both cognitive tasks.
    • The 60-mg dose did not show a significant difference compared to placebo.

    Conclusions:

    • Nimodipine, particularly at a 30-mg dose, can enhance cognitive information processing in healthy drug abusers.
    • This improvement in stimulus evaluation, as reflected by the P3 component, suggests nimodipine's potential therapeutic value.
    • Chronic nimodipine administration may help alleviate cognitive deficits in substance abusers and prevent relapse during abstinence.