RATIONALE: Preclinical studies suggest that stress potentiates cue-induced cocaine seeking and that this effect is more pronounced in females. These findings have not been characterized in clinical populations. OBJECTIVES: The objectives of this study were to examine the impact a pharmacological stressor, alpha-2 adrenergic receptor antagonist yohimbine, on the subjective, endocrine, and physiologic responses to drug-paired cues cocaine-dependent men and women. METHODS: In a double-blind placebo-controlled cross-over study, cocaine-dependent men (n = 32), cocaine-dependent women (n = 30), control men (n = 32), and control women (n = 25) received either yohimbine or placebo prior to two cocaine cue exposure sessions. RESULTS:Yohimbine increased ratings of anxiety both before (p < 0.001) and after (p = 0.035) cues, and the post-cue increase in anxiety was more pronounced in women (p = 0.001). Yohimbine also significantly increased craving, compared with placebo (p < 0.05), following the cue presentation, and this effect was greater in women than men (gender by treatment interaction; p = 0.006). Yohimbine also increased salivary cortisol (p < 0.001) and dehydroepiandrosterone (p = 0.003) levels, regardless of diagnostic group. Women had a significantly greater heart rate response following yohimbine as compared with men (p < 0.001). CONCLUSIONS: Stress may increase the salience of cocaine cues for cocaine-dependent women as compared with men. This suggests gender differences in vulnerability to craving and relapse under stressful conditions.
RCT Entities:
RATIONALE: Preclinical studies suggest that stress potentiates cue-induced cocaine seeking and that this effect is more pronounced in females. These findings have not been characterized in clinical populations. OBJECTIVES: The objectives of this study were to examine the impact a pharmacological stressor, alpha-2 adrenergic receptor antagonist yohimbine, on the subjective, endocrine, and physiologic responses to drug-paired cues cocaine-dependent men and women. METHODS: In a double-blind placebo-controlled cross-over study, cocaine-dependent men (n = 32), cocaine-dependent women (n = 30), control men (n = 32), and control women (n = 25) received either yohimbine or placebo prior to two cocaine cue exposure sessions. RESULTS:Yohimbine increased ratings of anxiety both before (p < 0.001) and after (p = 0.035) cues, and the post-cue increase in anxiety was more pronounced in women (p = 0.001). Yohimbine also significantly increased craving, compared with placebo (p < 0.05), following the cue presentation, and this effect was greater in women than men (gender by treatment interaction; p = 0.006). Yohimbine also increased salivary cortisol (p < 0.001) and dehydroepiandrosterone (p = 0.003) levels, regardless of diagnostic group. Women had a significantly greater heart rate response following yohimbine as compared with men (p < 0.001). CONCLUSIONS: Stress may increase the salience of cocaine cues for cocaine-dependent women as compared with men. This suggests gender differences in vulnerability to craving and relapse under stressful conditions.
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