Aim: An algorithm that uses clinical factors and CYP2C19 genotype to guide P2Y12 inhibitor selection in high-risk patients undergoing percutaneous coronary intervention was implemented at our institution. We sought to evaluate use of this algorithm and identify which factors influenced P2Y12 inhibitor selection.
Patients & Methods: This retrospective cohort study included 264 patients receiving percutaneous coronary intervention from July-December 2012.
Results: CYP2C19 genotype was obtained in 229 patients; of these, 30% were intermediate or poor metabolizers. CYP2C19 intermediate or poor metabolizer phenotype was among the strongest predictors for selecting prasugrel or ticagrelor as maintenance therapy (p < 0.001), and was the only significant predictor of a change in therapy (p < 0.001).
Conclusion: These findings suggest that using CYP2C19 genotype to guide P2Y12 inhibitor selection is feasible. Original submitted 27 October 2014; revision submitted 19 December 2014.
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http://dx.doi.org/10.2217/pgs.14.180 | DOI Listing |
Eur J Pharm Sci
January 2025
Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing, 211198, China. Electronic address:
Purpose: To evaluate the drug-drug interactions (DDI) of tunodafil (youkenafil), a novel phosphodiesterase type 5 inhibitor, its inhibitory effects on CYP450 enzymes in vitro and its clinical trials in combination with ritonavir or omeprazole were conducted.
Methods: The inhibitory effect of tunodafil on seven major CYP450 enzymes in human liver microsomes was investigated by probe substrate method. The effect of tunodafil on the pharmacokinetics of omeprazole (CYP2C19 substrate) in 40 healthy subjects, who received a single dose of 40 mg omeprazole in combination with tunodafil on the day 8 after taking 100 mg tunodafil daily for 7 days, was assessed based on CYP2C19 genotypes.
Stroke Vasc Neurol
January 2025
China National Clinical Research Center for Neurological Diseases, Beijing, China
Background And Purpose: Symptomatic internal carotid artery stenosis (sCAS) is an essential cause of transient ischaemic attack (TIA) or minor stroke. We aimed to evaluate whether the superiority of aspirin-ticagrelor over aspirin-clopidogrel varies between patients with sCAS or not.
Methods: This was a post-hoc analysis of the High-Risk Patients with Acute Nondisabling Cerebrovascular Events-II (CHANCE-2) trial, all of which were loss-of-function alleles carriers.
Arch Pharm Res
January 2025
College of Pharmacy, Dongguk University-Seoul, Goyang, 10326, Republic of Korea.
Introduction: Combination of clopidogrel and aspirin has been proven beneficial in treating symptomatic intracranial stenosis. The CYP2C19 polymorphism (CYP2C19*1, CYP2C19*2, CYP2C19*3, and CYP2C19*17 alleles) affects the efficacy of clopidogrel. Although epidemiologic studies of CYP2C19 polymorphism have been conducted in the Thai population, data on the frequency of allelic variants of CYP2C19 in Thai patients with symptomatic intracranial stenosis are lacking.
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