Study Objective-To estimate the cost-effectiveness of genotype-guided selection of antiplatelet therapy compared with selecting clopidogrel or prasugrel irrespective of genotype.
Design-Decision model based on event occurrence in the Trial to Assess Improvement in Therapeutic Outcomes by Optimizing Platelet Inhibition with Prasugrel-Thrombolysis in Myocardial Infarction (TRITON-TIMI) 38.Patients-Simulated cohort of patients with acute coronary syndrome scheduled to undergo percutaneous coronary intervention (PCI), consisting of three arms: those receiving genotypeguided antiplatelet therapy with clopidogrel or prasugrel, those receiving clopidogrel regardless of genotype, and those receiving prasugrel regardless of genotype.
Measurements and MainResults-All three arms of the model incorporated the probability that patients would experience a cardiovascular event (death from cardiovascular causes, nonfatal myocardial infarction, or non-fatal stroke), a bleeding event (major or minor bleeding), or no event while receiving antiplatelet therapy during the 15 months after the scheduled PCI. The cytochrome P450 (CYP) 2C19 genotype determined antiplatelet drug selection in the genotyping group. Costeffectiveness was expressed as the incremental cost-effectiveness ratio (ICER) for each event avoided in the genotype-guided therapy arm versus the other two arms. Genotype-guided antiplatelet therapy was dominant, or more effective and less costly, when compared with the selection of clopidogrel (ICER -$6760 [95% confidence interval (CI) -$6720 to -$6790]) or prasugrel 950]) for all patients with-out regard to genotype. Genotype-guided therapy that included generic clopidogrel was dominant to prasugrel for all patients 420]). Cost savings were not evident when genotype-guided therapy that included generic clopidogrel was compared with generic clopidogrel for all patients (ICER $2300 [95% CI $2290 to $2320]).Conclusion-Genotype-guided antiplatelet therapy selection may be more cost-effective and may provide more clinical value due to fewer adverse outcomes.
Keywordsclopidogrel; prasugrel; cytochrome P450 2C19; pharmacogenomics; cost-effectiveness NIH Public Access
Author ManuscriptPharmacotherapy. Author manuscript; available in PMC 2014 January 07. however, prasugrel will remain under patent for much longer and will presumably be more expensive than generic clopidogrel. The use of pharmacogenomic screening could allow for individualized antiplatelet therapy in which patients with fully functional CYP2C19 alleles could be treated with clopidogrel, whereas the more expensive agent (prasugrel) could be reserved for those with reduced-function CYP2C19 alleles. Whether this approach would be cost-effective has not been studied.Recently, a cost-effectiveness analysis based on the overall TRITON-TIMI 38 study without regard to genotype was published. 15 The study found prasugrel to be cost-effective compared with clopidogrel for patients with a planned PCI. The study found that average costs were $221/patient lower with pr...