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  • Title: Effect of drug-related cues on response inhibition through abstinence: A pilot study in male heroin abstainers.
    Author: Su B, Yang L, Wang GY, Wang S, Li S, Cao H, Zhang Y.
    Journal: Am J Drug Alcohol Abuse; 2017 Nov; 43(6):664-670. PubMed ID: 28635346.
    Abstract:
    BACKGROUND: Chronic heroin use can cause a deficit of inhibitory function, leading to a loss of control over drug use. Exposure to drug-related cues is considered as one of the contributing factors. However, it is unclear whether there are dynamic changes on the effect of drug-related cues on response inhibition following prolonged abstinence. OBJECTIVE: The present study investigated the effect of drug-related cues on response inhibition in heroin abstainers at different abstinent phases. METHODS: 26 shorter-term (2-6 months) and 26 longer-term (19-24 months) male heroin abstainers performed on a modified two-choice Oddball task, which included two conditions: in the cued condition, neutral pictures served as the background of standard stimuli (yellow frame) and heroin-related pictures served as the background of deviant stimuli (blue frame), reversed in the controlled conditions. RESULTS: Compared to longer-term abstainers, mean reaction time (RT) for drug deviants in shorter-term abstainers was significantly longer. Shorter-term abstainers also showed markedly slower response to neutral deviants relative to drug deviants, but this tendency was not observed in longer-term abstainers. Nevertheless, both groups had similar RT for standard stimuli regardless of their paired background pictures. CONCLUSION: Effect of drug-related cues on response inhibition remains at the early stage of abstinence; however, this effect may be reduced following a longer period of drug abstinence. Our findings highlight the importance of assessing and improving the ability of inhibiting drug-related cue reactivity during treatment.
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