Heparin is a naturally occurring anticoagulant, meaning it helps prevent blood clots. It is commonly used in medical settings, especially during surgeries or for patients at risk of developing clots. Heparin works by inhibiting certain proteins in the blood that promote clotting, allowing for smoother blood flow. Heparin can be administered through injections and is available in different forms, such as unfractionated heparin and low molecular weight heparin. While effective, it requires careful monitoring to avoid complications like bleeding. Healthcare providers often use blood tests to ensure the right dosage is given to patients.