Background: In the last several years, commercial pharmacogenetic (PGx) testing for the selection of psychotropic medications has become widespread as a means of implementing "precision medicine", with some insurers electing to cover the cost of testing. Mostly these efforts have focused on the decision of choosing a medication. Polypharmacy has become widespread and often the norm in patients with more severe of chronic illness. Objectives: This project is designed to evaluate the utility of PGx testing in reducing polypharmacy among Veterans with mental illness. Methods: The project is a randomized clinical trial in which 500 Veterans will be randomly assigned to have the results of the PGx battery available to clinical staff right after randomization (i.e., the intervention group) or after 3 months of treatment as usual (i.e., the delayed results group). The study will test the following primary hypotheses: 1. Veterans with psychiatric illness and currently receiving an antidepressant and at least one additional psychotropic medication whose care is guided by the results of the PGx battery (the intervention group) will have a higher rate of reduction in polypharmacy than those in the delayed results group. 2. Veterans whose care is guided by the results of the PGx battery (the intervention group) will have a higher rate of improvement in depressive symptoms (PHQ-9 score) than the delayed results group.
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Polypharmacy
Timeframe: 12 weeks
Symptoms of distress
Timeframe: 12 weeks.