Summary
Prophylaxis against venous thromboembolism (VTE) is considered standard of care. Appropriate
chemoprophylaxis for VTE has been mandated by the United States government agencies
and consumer groups. However, controversies exist regarding the most clinically relevant
and safe chemoprophylaxis protocols in patients undergoing joint replacement surgery.
Thus, this paper reviews the clinical efficacy and safety of newer oral anticoagulants.
A literature search was performed for oral anticoagulants in advanced stages of development
using PubMed and abstracts from thrombosis meetings. Most clinical trial data have
demonstrated equal or superior efficacy in venographic endpoints in comparison to
low-molecular-weight heparins (LMWH). However, bleeding complications have been reported
to occur with oral anticoagulants as frequently as or more frequently than with LMWH.
Other potential complications reported include liver enzyme elevation and cardiac
irregularities. It remains to be established whether newer oral anticoagulants will
be better alternatives to the current standard-ofcare in real-life medical clinical
practice.
Keywords
Oral anticoagulants - prophylaxis - safety - venous thromboembolism