Skip to main content
Log in

Extinction of Conditioned Responses to Methamphetamine-Associated Stimuli in Healthy Humans

  • Original Investigation
  • Published:
Psychopharmacology Aims and scope Submit manuscript

Abstract

Rationale

Contextual stimuli present during drug experiences become associated with the drug through Pavlovian conditioning and are thought to sustain drug-seeking behavior. Thus, extinction of conditioned responses is an important target for treatment. To date, acquisition and extinction to drug-paired cues have been studied in animal models or drug-dependent individuals, but rarely in non-drug users.

Objective

We have recently developed a procedure to study acquisition of conditioned responses after single doses of methamphetamine (MA) in healthy volunteers. Here, we examined extinction of these responses and their persistence after conditioning.

Methods

Healthy adults (18–35 years; N = 20) received two pairings of audio-visual stimuli with MA (20 mg oral) or placebo. Responses to stimuli were assessed before and after conditioning, using three tasks: behavioral preference, attentional bias, and subjective “liking.”

Results

Subjects exhibited behavioral preference for the drug-paired stimuli at the first post-conditioning test, but this declined rapidly on subsequent extinction tests. They also exhibited a bias to initially look towards the drug-paired stimuli at the first post-test session, but not thereafter. Subjects who experienced more positive subjective drug effects during conditioning exhibited a smaller decline in preference during the extinction phase. Further, longer inter-session intervals during the extinction phase were associated with less extinction of the behavioral preference measure.

Conclusions

Conditioned responses after two pairings with MA extinguish quickly, and are influenced by both subjective drug effects and the extinction interval. Characterizing and refining this conditioning procedure will aid in understanding the acquisition and extinction processes of drug-related conditioned responses in humans.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Fig. 1
Fig. 2
Fig. 3
Fig. 4

Similar content being viewed by others

References

Download references

Acknowledgements

The authors gratefully acknowledge contributions from Chris Boyson, Markus Heilig, and Leah Mayo and technical assistance from Austin Lee, Frances Enger, Alex Gura, Kristen Kitsch, Lauren Walker, and Maria Olex.

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Harriet de Wit.

Ethics declarations

Funding

This research was supported by DA037011. Dr. Cavallo was supported in part by a fellowship from the Clinical Pharmacology Fellowship Program in the University of Chicago Division of Biological Sciences.

Disclosure

The authors declare no conflict of interest.

Electronic supplementary material

Below is the link to the electronic supplementary material.

ESM 1

(PDF 69 kb)

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Cavallo, J.S., Ruiz, N.A. & de Wit, H. Extinction of Conditioned Responses to Methamphetamine-Associated Stimuli in Healthy Humans. Psychopharmacology 233, 2489–2502 (2016). https://doi.org/10.1007/s00213-016-4297-7

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s00213-016-4297-7

Keywords

Navigation