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A breath test to assess compliance with disulfiram

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To evaluate the ability of a hand-held breath analyser, the Zenalyser┬« (Zenics Medical), to identify alcohol-dependent patients receiving disulfiram therapy and to assess the sensitivity and specificity of the instrument at different time intervals post-disulfiram dosing. Design 

Breath samples were taken from two groups of alcohol-dependent patients, one group on a daily disulfiram regimen and one group receiving no disulfiram. The breath samples were analysed for the combined concentration of carbon disulphide and acetone produced from the metabolism of disulfiram. From these data, two reference ranges were prepared and used for sensitivity and specificity assessments. Setting 

Breath samples for the reference ranges were obtained from patients at Shelton Hospital, Shrewsbury. Breath samples used to assess the sensitivity and specificity of the instrument were obtained from patients at the Edinburgh Alcohol Problems Clinic. Participants 

Twenty in-patients from Shelton Hospital receiving a daily 200 mg disulfiram regimen and 20 in-patients receiving no disulfiram. At the Edinburgh Clinic, 54 patients taking a thrice-weekly disulfiram regimen and 22 patients not on disulfiram. Measurements 

A total of 489 breath samples from Shelton Hospital and 391 breath samples from the Edinburgh Clinic were analysed for the combined concentrations of carbon disulphide and acetone. Findings 

The breath analyser produced results that distinguished between the disulfiram-treated and untreated groups (P < 0.001). At 1 day post-dose, the sensitivity was 100% and the specificity was 100%. At 2 and 3 days post-dose, the sensitivities and specificities were 84.6% and 100% and 88.2% and 100%, respectively. Conclusion 

The breath analyser can improve the assessment of the compliance status of patients receiving a daily dose regimen of disulfiram, but is less useful for this purpose if disulfiram is taken on a thrice-weekly regimen.
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Keywords: Antabuse; Zenalyser®; breath test; compliance; disulfiram

Document Type: Research Article

Affiliations: 1: New House Drug and Alcohol Unit, Shelton Hospital, Shrewsbury, UK, 2: Zenics Medical, Leek, Staffordshire, UK, 3: The Health and Safety Laboratory, Buxton, Derbyshire, UK and 4: Alcohol Problems Clinic, Edinburgh, UK

Publication date: 2006-12-01

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