Heparins, including unfractionated heparin, low-molecular-weight heparins, and synthetic heparin analogues, are the most commonly used parenteral anticoagulant agents. The agents in this group vary in their half-lives, which should be considered when planning oral surgical procedures for these patients. Except for patients undergoing dialysis, these drugs are usually given for short-term treatment, and dental procedures can often be postponed until they are stopped. In patients who temporarily stop oral anticoagulant therapy for any reason, thromboembolism prevention is often managed with low-molecular-weight heparins. Minor oral surgeries, such as tooth extractions, are generally safe to perform without stopping low-molecular-weight heparins.