Dalteparin is a medication that belongs to a class of drugs known as low molecular weight heparins. It is primarily used to prevent and treat blood clots in patients, especially those undergoing surgery or those with certain medical conditions that increase the risk of clot formation. Dalteparin works by inhibiting specific clotting factors in the blood, thereby reducing the likelihood of clot development. This medication is typically administered through an injection under the skin. It is important for patients to follow their healthcare provider's instructions regarding dosage and duration of treatment. Common side effects may include bleeding, bruising, or injection site reactions, and patients should be monitored for any unusual symptoms during treatment.