Warfarin

What Is Warfarin?

Warfarin is an oral anticoagulant that reduces the body’s ability to form blood clots. It works by blocking the formation of vitamin K–dependent clotting factors, which are essential for blood coagulation. Doctors often prescribe Warfarin to people at high risk for blood clots due to heart conditions, surgery, or clotting disorders.

How Does Warfarin Work?

Warfarin interferes with the liver’s use of vitamin K, a key player in the blood-clotting process. By decreasing the production of clotting factors, Warfarin helps keep blood flowing smoothly through the vessels. This prevents clots that can lead to serious complications like heart attacks, strokes, or pulmonary embolism.

Because Warfarin affects blood clotting, regular blood tests (INR tests) are needed to monitor its effectiveness and safety.

Uses of Warfarin

Doctors prescribe Warfarin for a range of clot-related conditions, including:

• Atrial Fibrillation (AFib): To reduce stroke risk.
• Deep Vein Thrombosis (DVT): To treat or prevent leg clots.
• Pulmonary Embolism (PE): To prevent clots in the lungs.
• Mechanical Heart Valves: To prevent clot formation on valves.
• Post-surgery Recovery: Especially after orthopedic surgeries.

Always take Warfarin exactly as directed and never adjust the dose without consulting your healthcare provider.

Available Strengths of Warfarin

We offer the following Warfarin tablets in various dosages:

Warfarin 1mg

This is a low-dose option, often used for patients who are new to anticoagulants or have certain sensitivities. It may be combined with other strengths to fine-tune daily doses.

Warfarin 2mg

Commonly prescribed as a starting dose, Warfarin 2mg provides moderate anticoagulant activity. Your doctor may adjust the dosage based on your INR test results.

Warfarin 3mg

This intermediate strength is ideal for patients who have stabilized on Warfarin and require moderate daily dosing.

Warfarin 5mg

Warfarin 5mg is a high-dose option used for individuals with increased clotting risks or higher metabolic needs. It’s often used for maintenance therapy in chronic conditions.

How to Take Warfarin

• Take Warfarin once a day at the same time each day, with or without food.
• Swallow the tablet whole with water.
• Do not double up doses if you miss one—contact your doctor for guidance.
• Frequent INR blood tests are essential to maintain the correct dosage.
• Inform your doctor about all medications, including vitamins and herbal supplements, as they may interact with Warfarin.

Warfarin Dosage & Monitoring

Each person’s dose is unique. It depends on factors like age, weight, health conditions, and test results. Most patients undergo INR monitoring to ensure their blood stays within a safe range. Your doctor will adjust your dose based on INR test results to prevent bleeding or clotting issues.

Side Effects of Warfarin

While Warfarin is effective, it can cause side effects, especially if not monitored properly. Common side effects include:

• Easy bruising
• Bleeding gums
• Nosebleeds
• Heavy menstrual periods
• Blood in urine or stool

Serious side effects include internal bleeding or allergic reactions. Seek medical attention immediately if you experience:

• Unusual bleeding
• Severe headaches
• Dizziness or fainting
• Swelling or pain in limbs

Interactions to Watch For

Warfarin interacts with many medications, supplements, and even certain foods. Notably:

• Foods rich in vitamin K (like spinach, kale, and broccoli) can reduce Warfarin’s effect.
• Antibiotics, NSAIDs, and antifungals can increase bleeding risk.
• Alcohol can alter Warfarin metabolism and increase side effects.

Always inform your doctor before starting any new medications or supplements while on Warfarin.

Precautions and Warnings

• Not recommended during pregnancy, especially in the first trimester.
• Use with caution if you have liver or kidney disease, ulcers, or recent surgeries.
• Limit activities that could result in injury or bruising.
• Carry medical identification stating that you are taking Warfarin.

Storage Instructions

• Store Warfarin at room temperature (20°C to 25°C / 68°F to 77°F).
• Keep tablets in their original container, away from moisture and heat.
• Keep out of reach of children and pets.

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