Has your doctor prescribed you a medication to prevent blood clots? Some people call this a 'blood thinner'. It's normal to feel a little scared and nervous when you hear about this medication. Questions like "Will the bleeding stop if I cut my arm or leg?" may come to your mind. But this medication is actually something that can save your life. Today, we'll talk about these blood-thinning medications, or `Anticoagulants`, in a simple way that you can understand.
Simply put, what are these anticoagulants?
Anticoagulants are a class of medications that reduce the ability of your blood to clot. They help your body dissolve existing blood clots, or they prevent new clots from forming. These are not just pills.
- Oral medications
- As an injection (Injections)
- As a liquid given into a vein (Intravenous - IV)
These medications come in many forms, such as: These medications are often used to prevent and treat serious, life-threatening conditions such as strokes, heart attacks, and pulmonary embolisms.
Why do we need this type of medicine?
Imagine that you have a small cut on your arm or leg. After a while, the bleeding stops. How does that happen? It's because the blood clots. This is a wonderful defense mechanism in our body. This process stops excessive bleeding from a wound and the wound begins to heal.
However, the problem begins when these blood clots form unnecessarily, in inappropriate places, that is, inside blood vessels. What happens if a blood clot that forms in this way travels with the blood and gets stuck in a thin blood vessel in the brain, heart, or lungs? Then the blood flow to the organ that is supplied by that vessel stops, and that organ begins to malfunction and become damaged. This is the most dangerous thing.
These are some of the most serious conditions that can occur due to blood clots in this way.
| Dangerous situation | What simply happens |
|---|---|
| Stroke | A blood clot travels to the brain and blocks a small blood vessel there. This can cause brain cells to die. |
| Pulmonary Embolism (PE) | A blood clot blocks a major blood vessel leading to the lungs. This is a very serious, potentially fatal condition. |
| Heart Attack | A blood clot blocks the coronary arteries that supply blood to the heart. This also damages the heart muscle. |
Who is this medicine prescribed to the most?
Doctors prescribe these `Anticoagulants` to people who are at risk of developing the dangerous conditions mentioned above. Here are some of the medical conditions that put them at risk:
- Atrial Fibrillation: This is when the two upper chambers of the heart (atria) do not contract properly, but instead beat irregularly, as if they are quivering. When this happens, blood does not pump properly, and there is a greater chance that blood clots will form inside those chambers. If these blood clots break away from the heart and travel to the brain, they can cause a stroke.
- Heart Valve Surgery: When heart valves are replaced, especially with a mechanical valve, there is a risk of blood clots forming on the surface of the valve. This medication is essential to prevent this.
- Hip or Knee Replacement: After major surgeries like these, there is a risk of blood clots forming in the deep veins of the legs. We call this condition `Deep Vein Thrombosis (DVT).` Pulmonary Embolism occurs when a blood clot that forms in the leg breaks loose and lodges in the lungs.
- Blood Clotting Disorders: Some people have a genetic predisposition to blood clotting. Such people also need this medication.
Types of anticoagulants and how they work
There are several types of anticoagulants. Each type interferes with the blood clotting process in different ways. Let's look at the main types.
Oral Medications
1. Warfarin
This is a long-standing drug that works by blocking the body's ability to use vitamin K, a vitamin that is essential for blood clotting.
The biggest challenge with warfarin is that its dose varies greatly from person to person and needs to be precisely controlled.If the dose is slightly increased, the risk of bleeding increases, and if it is reduced, blood clots are not properly prevented. Therefore, people taking `Warfarin` should regularly have a blood test (`INR test`) to check whether the dose is correct.
2. Modern drugs (Direct Oral Anticoagulants - DOACs)
These are relatively new drugs. Drugs like `Dabigatran`, `Rivaroxaban`, `Apixaban` belong to this group. The biggest advantage of these is that they do not require frequent blood tests like `Warfarin`. They target specific enzymes involved in the blood clotting process (e.g. `Thrombin` or `Factor Xa`) and stop their activity.
Injectable and IV Medications
Heparin and related drugs
These are usually used in hospitals when quick results are needed. `Heparin` works by activating a natural protein (`Antithrombin`) in our body that prevents blood clotting, and stops the blood clotting process. `Low-Molecular-Weight Heparin (LMWH)` is a more advanced version of this, easier to administer, and sometimes even used at home.
What are the side effects and risks?
The main and expected risk of any anticoagulant is bleeding . This is because these medications control blood clotting. Therefore, even a small injury can cause a little more bleeding than normal.
However, some medications may have other side effects that are specific to them.
| Type of medicine | Notable special side effects |
|---|---|
| Warfarin |
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| Heparin |
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| DOACs (modern drugs) |
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When should you see a doctor? - This is something you should definitely know!
As a person taking this medication, you need to be very careful. Because you may not even notice any internal bleeding. So be very careful about the following things.
| Emergencies and situations where medical advice should be sought | |
|---|---|
| If you have these symptoms, talk to your doctor. | |
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| If you have these symptoms, go to a hospital's Emergency Department (ETU) immediately! | |
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The most important thing is to tell every doctor and dentist who treats you that you are taking an anticoagulant. It is essential to inform this even before having a tooth extracted.
Take-Home Message
- Anticoagulants are a type of life-saving medication that protects you from serious conditions like stroke and heart attack. So don't be afraid of these medications.
- Be sure to take the prescribed dose, at the prescribed time, as your doctor tells you. Don't skip a single day.
- Because there is a risk of bleeding while taking this medication, be as careful as possible about activities that could cause falls and injuries, and about dangerous sports.
- In the event of unusual bleeding, bruising, or a head injury, seek medical advice immediately without delay .
- Before starting any other medication (including painkillers), tell your doctor that you are taking anticoagulants, as some medications can interact with these.
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