{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,17]],"date-time":"2026-09-17T16:14:21Z","timestamp":1789661661666,"version":"4.0.1"},"reference-count":50,"publisher":"Wiley","issue":"6","license":[{"start":{"date-parts":[[2020,4,5]],"date-time":"2020-04-05T00:00:00Z","timestamp":1586044800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Brit J Clinical Pharma"],"published-print":{"date-parts":[[2020,6]]},"abstract":"<jats:sec><jats:title>Aims<\/jats:title><jats:p><jats:italic>CYP2D6<\/jats:italic> genetic polymorphisms are associated with metoprolol pharmacokinetics. Whether the clinical response to metoprolol is also affected remains uncertain.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>We conducted a systematic review on the effects of <jats:italic>CYP2D6<\/jats:italic> polymorphism on the clinical response to metoprolol. Searches were conducted using MEDLINE. Meta\u2010analyses were performed on the impact of CYP2D6\u2010inferred phenotypes on heart rate (HR) reduction, diastolic (DBP) and systolic (SBP) blood pressure reduction, average daily doses, all\u2010type adverse events and bradycardia.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Our qualitative assessment indicated inconsistent results in individual studies and endpoints, but CYP2D6 poor metabolizers (PM) generally presented a greater reduction in HR. The meta\u2010analysis of 15 studies, including a total of 1146 individuals, found a reduction in HR of 3 beats\/min (<jats:italic>P =<\/jats:italic> .017), and of SBP and DBP by 3 mmHg (<jats:italic>P =<\/jats:italic> .0048) for PM compared to non\u2010PM individuals using similar metoprolol doses. Bradycardia appeared more frequent by 4\u2010fold for PM, although significant heterogeneity was observed regarding bradycardia, which limits the scope of this finding.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>Patients without any CYP2D6 metabolic capacities appear to have increased reduction in DBP, HR and SBP during metoprolol treatment and may be at a higher risk of bradycardia compared to patients with active CYP2D6 phenotypes. Further prospective data are required to determine whether <jats:italic>CYP2D6<\/jats:italic> is associated with clinical events in patients treated with metoprolol, as well as to demonstrate the clinical utility of an individualized approach of prescribing metoprolol using CYP2D6\u2010inferred phenotypes.<\/jats:p><\/jats:sec>","DOI":"10.1111\/bcp.14247","type":"journal-article","created":{"date-parts":[[2020,2,24]],"date-time":"2020-02-24T05:41:15Z","timestamp":1582522875000},"page":"1015-1033","source":"Crossref","is-referenced-by-count":59,"title":["<i>CYP2D6<\/i> polymorphism and its impact on the clinical response to metoprolol: A systematic review and meta\u2010analysis"],"prefix":"10.1111","volume":"86","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5857-5515","authenticated-orcid":false,"given":"Maxime","family":"Meloche","sequence":"first","affiliation":[{"name":"Faculty of Pharmacy Universit\u00e9 de Montr\u00e9al  Montreal Quebec Canada"},{"name":"Universit\u00e9 de 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