Abstract

Purpose This study identified factors that contributed to bleeding complications associated with warfarin therapy that were documented as adverse drug reactions (ADRs). Methods A retrospective chart review was performed using the Medical Records Department's “E” code list of anticoagulant-related ADRs. Descriptive statistics were used to identify common factors associated with bleeding complications related to warfarin use. Results Patients 60 years of age or older experienced 78% of all events; a majority (81%) of reports involved the presence of comorbid conditions such as congestive heart failure, carcinoma, or sepsis. A supratherapeutic INR was documented for 75% of patients with anticoagulant-related ADRS. Conclusions Age, comorbid conditions, and anticoagulation intensity were identified as possible factors contributing to documented ADRs associated with warfarin therapy.

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