Predictors of psychotropic medication adherence among HIV+ individuals living with bipolar disorder

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Abstract

Objective: HIV infection and bipolar disorder are highly comorbid and associated with frontostriatal disruption, emotional dysregulation, and neurocognitive impairment. Psychiatric and cognitive factors have been linked to antiretroviral nonadherence; however, predictors of psychotropic adherence among HIV+ individuals with psychiatric comorbidities have not been explored. We evaluated predictors of psychotropic adherence among individuals with HIV infection and bipolar disorder. Method: Psychiatric medication adherence of 50 participants with HIV infection and bipolar disorder was tracked for 30 days using Medication Event Monitoring Systems. Participants completed neurocognitive, neuromedical, and psychiatric batteries. Results: Mean psychotropic adherence rate was 78%; 56% of participants achieved ≥90% adherence. Younger age and onset of depressive symptoms, more severe current depressive symptoms, number of previous psychiatric hospitalizations and suicide attempts, poorer neurocognition, and more negative attitudes and self-beliefs toward medications univariably predicted worse psychotropic adherence (p's <0.003). Secondary analyses revealed an interaction between neurocognition and mood, such that individuals with HIV infection and bipolar disorder who had greater executive dysfunction and depressive symptoms evidenced the poorest psychotropic adherence (p<0.001). Conclusions: Both psychiatric and neurocognitive factors contribute to poorer psychotropic adherence among HIV+ individuals with serious mental illness. Adherence interventions aimed at remediating these factors may be especially fruitful.

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Casaletto, K. B., Kwan, S., Montoya, J. L., Obermeit, L. C., Gouaux, B., Poquette, A., … Moore, D. J. (2016). Predictors of psychotropic medication adherence among HIV+ individuals living with bipolar disorder. International Journal of Psychiatry in Medicine, 51(1), 69–83. https://doi.org/10.1177/0091217415621267

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