Reversal of Newer Direct Oral Anticoagulant Drugs (DOACs).

Anticoagulation therapy is indicated for management of various clinical conditions to prevent adverse events and introduction of direct oral anticoagulants (DOACs) has ushered in a new era in anticoagulation therapy. Major advantages of DOACS include fewer drug interactions and that they do not need periodic monitoring. Several patients who were not on anticoagulation before due to older age, polypharmacy/drug interaction concerns, and logistics of periodic monitoring are now on anticoagulation with DOACs. Despite their many advantages, a challenge while prescribing DOACs is very limited availability of specific reversal agents and lack of understanding or guidance about the treatment strategy in case of major life threatening bleeding or need for urgent surgery. So far only one reversal agent has been approved by the Food and Drug Administration (FDA), idarucizumab for one of the DOACs i.e., dabigatran. Several other reversal agents are under final phases of development such as andexanet alfa and PER977 (ciraparantag) and will help in developing specific strategies for reversal of these agents. In this article, we review current strategies to manage bleeding with DOACs and provide guidance to clinicians of inhibiting LF activity in vitro and in cells, as well as in animal models of anthrax infection.