Systematic evaluation of commercial pharmacogenetic testing in psychiatry: a focus on CYP2D6 and CYP2C19 allele coverage and results reporting.

Objective: The aim of this study was to systematically assess commercial pharmacogenetic tests relevant to prescribing in psychiatry, with specific attention on CYP2D6 and CYP2C19 star allele coverage as well as compliance with consensus recommendations for pharmacogenetic test result reporting. Materials and methods: The CYP2D6 and CY2C19 star (*) allele contents of 20 pharmacogenetic test panels were compared and their test results reports were evaluated on the basis of consensus reporting recommendations published by The Centers for Disease Control and Prevention as well as the Clinical Pharmacogenetics Implementation Consortium. Results: Most test panels included the major CYP2D6 (*2, *4, *5, *10, *17) and CYP2C19 (*2, *3, *17) alleles, but no two test panels contained the same combination of CYP2D6 and CYP2C19 alleles. Of the 20 pharmacogenetic reports that we evaluated, none fulfilled all the recommendations and no recommendation was fulfilled by all tests. Conclusion: Consensus has yet to be reached on which CYP2D6 and CYP2C19 star alleles to include on pharmacogenetic testing panels and pharmacogenetic results reporting could be considerably improved. Collaboration between test manufacturers and end-users is required to narrow the gap between the availability and integration of these pharmacogenetic-based decision-support tools into routine practice. Copyright (C) 2017 Wolters Kluwer Health, Inc. All rights reserved.

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