, Volume 33, Issue 4, pp 369–376 | Cite as

Effects of (−)δ9-trans-tetrahydrocannabinol (δ9-THC) on memory, attention and subjective state

A double blind study
  • A. Dittrich
  • K. BÄttig
  • Ilka von Zeppelin
Human Pharmacology


In a double blind study, cross-over design, on 37 volunteers several effects of an orally administered dosage of 15 mgs (−)-δ9-trans-tetrahydrocannabinol (δ9-THC) were assessed. The results did bear out the hypotheses of this experiment that the impairment of attention and information storage in the long-term memory as well as depersonalization and temporal disintegration phenomena induced by δ9-THC are interrelated. Furthermore, the sequence of information retrieval from memory was found to be changed by δ9-THC.

Key words

Attention Depersonalization Memory Temporal Disintegration (−)δ9-trans-Tetrahydrocannabinol 


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Copyright information

© Springer-Verlag 1973

Authors and Affiliations

  • A. Dittrich
    • 1
  • K. BÄttig
    • 2
  • Ilka von Zeppelin
    • 3
  1. 1.Research DepartmentPsychiatric University Clinic BurghölzliZurich
  2. 2.Institute for Hygienics and Physiology of LabourETHZurich
  3. 3.Department of Clinical PsychologyPsychological Institute of the University of ZurichSchweiz

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