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Comment & Response
June 23/30, 2015

Dosing Recommendations for New Oral Anticoagulants—Reply

Author Affiliations
  • 1Eshelman School of Pharmacy, University of North Carolina, Chapel Hill

Copyright 2015 American Medical Association. All Rights Reserved. Applicable FARS/DFARS Restrictions Apply to Government Use.

JAMA. 2015;313(24):2496-2497. doi:10.1001/jama.2015.5754

In Reply I agree with Drs Kreuzer and Dugi that DOACs are probably better drugs than warfarin for the reasons described. However, there is a strong probability that DOACs could be significantly more efficacious and safer for all patients. For drugs with narrow therapeutic indexes in which death can result from underdosing or overdosing, a more personalized dosing scheme seems worthy to evaluate.

My Viewpoint advocated re-analyzing the results of all phase 3 trials of DOACs to determine if individualized dosing to either a drug plasma concentration or pharmacodynamic biomarker end point associated with efficacy and safety is warranted. It would be impossible for me to advocate therapeutic drug monitoring now because an individualized dosing scheme has not been established. This work should be done.

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