Related Experiment Video
Updated: May 7, 2025

The WATCHMAN Left Atrial Appendage Closure Device for Atrial Fibrillation
Published on: February 28, 2012
Drug-Drug Interactions Between DAAs and Anticoagulants or Antiplatelets: A Position Paper of the Italian
Elisabetta Tombolini1, Alessandro Squizzato2,3, Gian Marco Podda4
1Emergency Medicine and Thrombosis and Haemostasis Center, ASST Sette Laghi, Varese, Italy.
Insights
Direct-acting antiviral agents (DAAs) offer new hope for hepatitis C virus (HCV) infection, but drug-drug interactions (DDIs) with blood thinners are a concern. This study provides guidance for managing these complex cases.
Area of Science:
- Hepatology
- Pharmacology
- Cardiology
Background:
- Chronic hepatitis C virus (HCV) infection management has evolved with direct-acting antiviral agents (DAAs).
- HCV infection is linked to increased cardiovascular risk.
- DAAs have complex metabolic pathways, raising concerns for drug-drug interactions (DDIs).
Purpose of the Study:
- To provide guidance on managing DDIs between DAAs and antiplatelet or anticoagulant drugs.
- To address the clinical challenge of co-prescribing DAAs with antithrombotic agents.
Main Methods:
- Review of pharmacodynamic and pharmacokinetic data.
- Integration of clinical experience in hemostasis and thrombosis.
- Evidence-based recommendations for managing DDIs.
Main Results:
- Identification of potential DDIs between DAAs and antiplatelet/anticoagulant therapies.
- Development of practical strategies for managing these interactions.
- Emphasis on individualized patient management.
Conclusions:
- Managing DDIs is crucial for safe and effective HCV treatment with DAAs.
- Clinical experience and pharmacokinetic/pharmacodynamic data are key to managing these interactions.
- Further research may be needed to fully elucidate DDI profiles.
Abstract:
The natural history of chronic hepatitis C virus (HCV) infection has changed after the introduction of direct-acting antiviral agents (DAAs). Screening programs have been ongoing to reach the World Health Organisation's goal of HCV elimination by 2030, and most infected people are eligible for treatment. Given the increased cardiovascular risk in people with HCV infection and the metabolic pathways of DAAs, it is not uncommon to face the issue of drug-drug interactions (DDIs) with antiplatelet or anticoagulant drugs. In the absence of clinical trials, we offer suggestions to deal with DDIs in case of treatment of patients with DAAs who are also receiving antiplatelet or anticoagulant drugs, based on the best available evidence from pharmacodynamics and pharmacokinetics studies in conjunction with clinical experience in the field of haemostasis and thrombosis.
Related Concept Videos
Anticoagulant Drugs: Vitamin K Antagonists and Direct Oral Anticoagulants
Warfarin, a prominent vitamin K antagonist family member, exerts its effect by inhibiting the enzyme VKORC1 (vitamin K epoxide reductase complex 1). By hindering this enzyme, warfarin...
Antiplatelet Drugs: Prostaglandin Synthesis, P2Y12 and Glycoprotein IIb/IIIa Inhibitors
Prostaglandin synthesis inhibitors, exemplified by the widely known aspirin, wield their power by irreversibly acetylating...
Anticoagulant Drugs: Low-Molecular-Weight Heparins
Factors Affecting Protein-Drug Binding: Drug Interactions
Displacement interactions can have varying outcomes, ranging from toxicity to virtually...
Combined Effects of Drugs: Antagonism
The most common type is receptor antagonism, where one drug acts as an antagonist to block the effects of another drug by...
Antihypertensive Drugs: Direct Renin Inhibitors

