Aim: To assess the relationship between long-term naltrexone treatment and anxiety, depression and craving in opioid dependent individuals.
Material And Methods: Opioid dependent patients (n=306) were enrolled in a three cell (102ss/cell) randomized, double blind, double dummy, placebo-controlled 6-month trial comparing extended release implantable naltrexone with oral naltrexone and placebo (oral and implant). Monthly assessments of affective responses used a Visual Analog Scale for opioid craving, the Beck Depression Inventory, Spielberger Anxiety Inventory, and the Ferguson and Chapman Anhedonia Scales. Between-group outcomes were analyzed using mixed model analysis of variance (Mixed ANOVA) and repeated measures and the post hoc Tukey test.
Results And Conclusion: Anhedonia, depression, anxiety, and craving for opiates were elevated at baseline but gradually reduced to normal within the first 1-2 months for patients who remained in treatment and did not relapse. There were no significant between-group differences prior to treatment dropout as well as between those who relapsed and who continued on naltrexone.
Conclusion: These data do not support concerns that naltrexone treatment of opioid dependence precipitates anhedonia, depression, anxiety or craving for opiates.
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