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Article

A descriptive study of antithrombotic medication patterns in adult patients with recent venous thromboembolism

Fady Allahwerdy1, Steven Pan1, Michael Feehan2, Aubrey E. Jones3, Mark A. Munger4, Daniel M. Witt3

  1. 1Department of Pharmacotherapy, College of Pharmacy, University of Utah, Salt Lake City, UT, United States.
  2. 2Kantar LLC, San Francisco, CA, United States.
  3. 3Thrombosis Service, University of Utah Health; & Department of Pharmacotherapy, College of Pharmacy, University of Utah, Salt Lake City, UT, United States.
  4. 4Department of Pharmacotherapy, College of Pharmacy; & Department of Internal Medicine, School of Medicine, University of Utah, Salt Lake City, UT, United States.

Received: 02-05-2019; Accepted: 18-08-2019.

Volume 17, Issue 3 · pp. 1539 · PUBLISHED 22 August 2019 · DOI: 10.18549/PharmPract.2019.3.1539

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ABSTRACT

Objectives: The objective of this study is to describe the most common self-reported antithrombotic therapy utilization patterns in a national cohort of patients with recent venous thromboembolism (VTE). Methods: Extant data from a national online survey administered to 907 patients 18 years of age or older with VTE in the last two years were analyzed. Patients' self-reported antithrombotic usage patterns used during three phases of treatment for the most recent VTE episode were summarized using descriptive statistics. Results: The following overall antithrombotic usage patterns were identified: warfarin (38.7%), direct oral anticoagulants (DOACs) (26.1%), switching between warfarin and DOACs (13.3%), aspirin only (8.7%), switching between different DOACs (4.5%), injectable anticoagulants only (3.9%), and no treatment (4.7%). Extended antithrombotic therapy beyond 90 days was reported by 65.7% of patients. Aspirin coadministration with anticoagulant therapy occurred for 33.7%. Conclusions: In this national sample of recent VTE sufferers warfarin therapy remains the most used anticoagulant followed closely by DOAC therapy. Switching between warfarin and DOACs and between different DOACs was common which could indicate adverse events or affordability issues. Aspirin coadministration with anticoagulant therapy was present in 1 of 3 patients and is a potential medication safety intervention for anticoagulation providers.

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    Allahwerdy, F., Pan, S., Feehan, M., Jones, A. E., Munger, M. A., & Witt, D. M. (2019). A descriptive study of antithrombotic medication patterns in adult patients with recent venous thromboembolism. Pharmacy Practice, 17(3), 1539. https://doi.org/10.18549/PharmPract.2019.3.1539