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Antiplatelet Drugs: Prostaglandin Synthesis, P2Y12 and Glycoprotein IIb/IIIa Inhibitors01:20

Antiplatelet Drugs: Prostaglandin Synthesis, P2Y12 and Glycoprotein IIb/IIIa Inhibitors

Antiplatelet drugs emerge as frontline defenders against the insidious threat of thromboembolic diseases, where abnormal clots obstruct vital blood vessels. These drugs stand as bulwarks, inhibiting platelet aggregation and clot formation, thereby mitigating the risk of life-threatening conditions like myocardial infarction, coronary artery disease, and thrombotic strokes.
Prostaglandin synthesis inhibitors, exemplified by the widely known aspirin, wield their power by irreversibly acetylating...
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Pharmacogenetic Phenotypes: Alterations in Pharmacokinetics, Drug Targets and Biologic Milieu

Genetic variations significantly influence drug response through pharmacokinetics, receptor interactions, and biologic milieu modifications. Pharmacokinetic alterations impact drug metabolism and clearance, affecting efficacy and toxicity. Variants in drug-metabolizing enzymes, such as CYP2C9 and CYP2C19, alter drug activation and elimination. For example, CYP2C9 loss-of-function variants require lower warfarin doses to prevent excessive bleeding, while CYP2C19 variants reduce clopidogrel...
Anticoagulant Drugs: Vitamin K Antagonists and Direct Oral Anticoagulants01:18

Anticoagulant Drugs: Vitamin K Antagonists and Direct Oral Anticoagulants

Oral anticoagulants are vital tools in preventing and treating blood clotting disorders. This diverse class of medications can be categorized as vitamin K antagonists, exemplified by warfarin, and direct thrombin inhibitors (DTIs), such as dabigatran, as well as factor Xa inhibitors, including rivaroxaban.
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Interventional Diagnostic Procedure: A Practical Guide for the Assessment of Coronary Vascular Function
10:28

Interventional Diagnostic Procedure: A Practical Guide for the Assessment of Coronary Vascular Function

Published on: March 15, 2022

[Clopidogrel and its salts: any clnical implication?].

Oliver Kummer1, Marco Roffi, Grischa Marti

  • 1Division de pharmacologie et toxicologie cliniques, Hôpital régional de Thoune, 3600 Thoune. oliver.kummer@spitalstsag.ch

Revue Medicale Suisse
|June 25, 2010
PubMed
Summary

New clopidogrel salt formulations require rigorous testing for therapeutic equivalence in patients. Bioequivalence studies for the active metabolite are crucial, especially given the drug's variable response and non-linear pharmacokinetics.

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Last Updated: Jun 12, 2026

Interventional Diagnostic Procedure: A Practical Guide for the Assessment of Coronary Vascular Function
10:28

Interventional Diagnostic Procedure: A Practical Guide for the Assessment of Coronary Vascular Function

Published on: March 15, 2022

Area of Science:

  • Pharmacology
  • Cardiovascular Medicine
  • Drug Development

Background:

  • Clopidogrel hydrogen sulfate is an antiplatelet agent used to prevent cardiovascular events.
  • Existing approvals for new clopidogrel salt formulations relied on limited pharmacokinetic data from healthy volunteers.
  • Clopidogrel exhibits significant inter-individual variability in platelet response and non-linear pharmacokinetics of its active metabolite.

Purpose of the Study:

  • To highlight the need for robust bioequivalence testing of new clopidogrel salt formulations.
  • To emphasize the importance of evaluating therapeutic equivalence in the target patient population.
  • To advocate for standardized and validated bioequivalence methods for the active metabolite.

Main Methods:

  • Review of current approval standards for clopidogrel salt formulations.
  • Analysis of pharmacokinetic variability and dose-linearity of clopidogrel's active metabolite.
  • Discussion of ideal and alternative bioequivalence testing strategies.

Main Results:

  • Current approval processes may not adequately capture the clinical variability of clopidogrel.
  • Pharmacokinetic data from healthy volunteers may not translate to the target patient population.
  • A significant need exists for validated bioequivalence studies focusing on the active metabolite.

Conclusions:

  • New clopidogrel salt formulations should ideally undergo therapeutic equivalence testing in patients.
  • If patient studies are not feasible, validated bioequivalence studies of the active metabolite are essential.
  • Ensuring consistent bioequivalence is critical for the safe and effective use of clopidogrel formulations.