Warfarin Sodium

Updated: 2026-07-15

Overview

Warfarin Sodium is a widely used anticoagulant that functions by inhibiting the synthesis of vitamin K-dependent clotting factors. It is a derivative of coumarin and has been in clinical use since the 1950s. The compound is known for its effectiveness in preventing and treating thromboembolic disorders, including deep vein thrombosis and pulmonary embolism. Warfarin Sodium is available in tablet form and is often prescribed for long-term anticoagulation therapy. Its use requires careful monitoring of the International Normalized Ratio (INR) to ensure therapeutic efficacy while minimizing the risk of bleeding complications.

Physical and Chemical Properties

Warfarin Sodium is a white, crystalline powder with a molecular weight of 330.31 g/mol. It is soluble in water and slightly soluble in ethanol. The compound has a melting point of 161-162°C and is stable under normal storage conditions. Chemically, Warfarin Sodium is a sodium salt of warfarin, which is a racemic mixture of two active enantiomers. Its anticoagulant activity is primarily due to its ability to inhibit the enzyme vitamin K epoxide reductase, thereby disrupting the vitamin K cycle and reducing the production of functional clotting factors.

Main Applications

Warfarin Sodium is primarily used to prevent and treat thromboembolic conditions such as deep vein thrombosis, pulmonary embolism, and atrial fibrillation. It is also prescribed for patients with mechanical heart valves to reduce the risk of clot formation. In addition to its clinical applications, Warfarin Sodium is used in rodenticides due to its anticoagulant properties. However, its use in this context is highly regulated due to the potential for accidental poisoning in non-target species.

Safety and Storage

Warfarin Sodium must be handled with care due to its potent anticoagulant effects. It should be stored in a cool, dry place away from light to maintain stability. Proper labeling and secure storage are essential to prevent accidental ingestion or misuse. Patients on Warfarin Sodium therapy require regular monitoring of INR levels to ensure the dosage is within the therapeutic range. Overdose can lead to severe bleeding, while underdosing may result in insufficient anticoagulation. Healthcare providers must educate patients on the signs of bleeding and the importance of adherence to prescribed dosages.

B2B Procurement Guide

When procuring Warfarin Sodium, B2B buyers should prioritize suppliers who comply with pharmacopeia standards such as USP (United States Pharmacopeia) or EP (European Pharmacopoeia). Quality assurance documentation, including Certificates of Analysis (CoA), should be reviewed to verify purity and potency. Buyers should also consider the supplier's reputation, production capacity, and lead times. Bulk purchases may offer cost advantages, but storage conditions must be strictly adhered to. Additionally, buyers should stay informed about regulatory changes that may impact the availability or pricing of Warfarin Sodium.