A pilot study of the effectiveness of d-cycloserine during cue-exposure therapy in abstinent alcohol-dependent subjects
- B. J. WatsonAffiliated withPsychopharmacology Unit, Bristol UniversityNeuropsychopharmacology Unit, Imperial College LondonAvon and Wiltshire Mental Health Partnership NHS Trust Email author
- , S. WilsonAffiliated withPsychopharmacology Unit, Bristol UniversityNeuropsychopharmacology Unit, Imperial College London
- , L. GriffinAffiliated withAvon and Wiltshire Mental Health Partnership NHS Trust
- , N. J. KalkAffiliated withNeuropsychopharmacology Unit, Imperial College London
- , L. G. TaylorAffiliated withPsychopharmacology Unit, Bristol UniversityUniversity Hospitals Bristol NHS Trust
- , M. R. MunafòAffiliated withDepartment of Experimental Psychology, University of Bristol
- , A. R. Lingford-HughesAffiliated withNeuropsychopharmacology Unit, Imperial College London
- , D. J. NuttAffiliated withNeuropsychopharmacology Unit, Imperial College London
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Cue-exposure therapy (CET) has been advocated as a potentially effective treatment of addictive behaviours. Strategies that enhance learning may improve the outcome of CET. d-cycloserine (DCS), a partial N-methyl-d-aspartate receptor agonist, has been shown to facilitate extinction of learned fear in rats and augment exposure-based treatment in some anxiety disorders in man.
This double-blind placebo-controlled pilot study used a cue-exposure paradigm, salient for an individual’s alcohol drinking, to see if DCS would reduce cue-reactivity compared with placebo.
Sixteen abstinent, alcohol-dependent individuals were randomised to receive either a single-dose (250 mg) DCS or placebo before CET sessions, separated by at least 1 week. Subjective responses were assessed using the Alcohol Urge Questionnaire (AUQ) and visual analogue scales. Cardiovascular responses were assessed using Finapres©.
The cue-exposure paradigm significantly increased craving assessed with the AUQ during the first session. In subsequent sessions, the degree of craving was reduced. However, no significant difference was seen between the DCS and placebo groups in any outcome measure. The variability of responses between individuals was great with more than half the groups reporting no or very small changes in AUQ scores.
This is the first human study to our knowledge to assess the efficacy of DCS in facilitating CET in alcohol dependence. The high proportion of subjects with little or no response to cue-exposure would make any effect of DCS very difficult to detect. It is important that future studies carefully consider the criteria for inclusion.
KeywordsAlcohol Craving Cue-exposure Learning Addiction NMDA d-cycloserine
- A pilot study of the effectiveness of d-cycloserine during cue-exposure therapy in abstinent alcohol-dependent subjects
Volume 216, Issue 1 , pp 121-129
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- 1. Psychopharmacology Unit, Bristol University, Dorothy Hodgkin Building, Whitson Street, Bristol, BS1 3NY, UK
- 2. Neuropsychopharmacology Unit, Imperial College London, London, UK
- 3. Avon and Wiltshire Mental Health Partnership NHS Trust, Bristol, UK
- 5. University Hospitals Bristol NHS Trust, Bristol, UK
- 4. Department of Experimental Psychology, University of Bristol, Bristol, UK