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The interaction of psychiatric symptoms with drug dependence during pregnancy is not well understood. This study examines the relationship of psychiatric symptoms to severity of drug use and drug-related problems among participants in a clinical trial of pharmacologic treatment of opioid dependence during pregnancy (N = 174). A total of 64.6% reported additional psychiatric symptoms (48.6% mood symptoms, 40.0% anxiety symptoms, and 12.6% suicidal thinking). Women who endorsed co-occurring psychiatric symptoms showed more severe impairment on the Addiction Severity Index. Further investigation is warranted to understand the effect of psychiatric symptoms on long-term maternal and neonatal outcomes.
Benningfield et al. (2010) studied this question.