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Anticoagulation in pregnancy.

S M Bates¹, J S Ginsberg

¹Department of Medicine, McMaster University, Hamilton Civic Hospitals Research Centre, Ontario.

Pharmacy Practice Management Quarterly

|April 5, 2000

Summary

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Anticoagulant use in pregnancy for blood clots requires careful management. Warfarin should be switched to heparin, particularly during the first trimester and near delivery, for safer outcomes.

Area of Science:

Obstetrics and Gynecology
Cardiology
Pharmacology

Background:

Anticoagulant therapy is crucial for preventing thromboembolic events in pregnant individuals with valvular heart disease.
Warfarin, unfractionated heparin, and low-molecular-weight heparin pose unique challenges during pregnancy.

Purpose of the Study:

To review the complications and benefits of different anticoagulants used during pregnancy.
To provide evidence-based recommendations for anticoagulant treatment throughout pregnancy, delivery, and postpartum.

Main Methods:

A comprehensive literature review was conducted to gather existing data on anticoagulant use in pregnancy.
Recommendations were extrapolated from limited available data.

Main Results:

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Limited data exists, but warfarin poses risks and should be replaced by heparin during specific pregnancy periods.
Heparin is recommended over warfarin, especially between weeks 6-12 and in the late third trimester.

Conclusions:

Anticoagulant management during pregnancy necessitates careful consideration of drug-specific risks and benefits.
Heparin is generally preferred over warfarin for venous thromboembolism prophylaxis and treatment in pregnant patients.