07-HealthPulse-Dos and Donts of Blood Thinners 07-HealthPulse-Dos and Donts of Blood Thinners
Preventive Care
Heart Health

Do's and Don'ts of Blood Thinners

12 August 2025 · 4 mins read

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Discover the essential do's and don'ts of blood thinners. Learn safety tips, proper usage, and what to avoid for better health management. Stay informed today.

What do Blood Thinners Do?

Blood thinners are medications that help prevent the formation of new blood clots. While they cannot dissolve existing clots, they can stop them from growing larger. Treating blood clots is crucial, as they can lead to serious complications like heart attacks, strokes, or blockages in blood vessels and the heart.

What Should You Do Before Starting Blood Thinners to Stay Safe?

Before starting blood thinner medications, it is important to have an open discussion with your healthcare provider. Make sure to:

  • Get a complete medical evaluation to determine if blood thinners are appropriate for you, especially if you have any underlying conditions like liver or kidney problems.
  • Review your current medications, including over-the-counter drugs and herbal supplements, to ensure they do not interact with blood thinners. Some medications can increase the risk of bleeding, while others may reduce the effectiveness of blood thinners.
  • Inform your doctor about any allergies or previous reactions to medications. This is crucial in determining the safest blood thinner for you.

How Can the Foods You Eat Affect Your Blood Thinner Medicine?

Food can directly impact how blood thinners work, especially warfarin

  • Vitamin K: Foods like kale, spinach, and broccoli are rich in vitamin K, which can reduce the effectiveness of warfarin.
  • Alcohol: Excessive alcohol consumption can interfere with blood thinning, increasing bleeding risks.
  • Consistency is key: It is important to maintain a steady intake of vitamin K foods, not eliminating them completely, to prevent fluctuations in INR levels.

Are There Any Medicines or Supplements You Should Avoid While on Blood Thinners?

Before starting blood thinners, it is important to take precautions to ensure safety.

Check Your Medications 

Some medications and supplements can interact with blood thinners, increasing the risk of bleeding. These include:

  • NSAIDs (e.g., ibuprofen, aspirin)
  • Herbal supplements (e.g., ginseng, garlic, ginger)
  • Certain antibiotics (e.g., ciprofloxacin)

Monitor Blood Levels 

If you are taking warfarin, regular blood tests (such as checking INR levels) help ensure you are on the right dosage.

Be Mindful of Food & Alcohol 

What you eat and drink can affect how blood thinners work.

  • Vitamin K-rich foods (e.g., spinach, kale) can reduce warfarin’s effect. Instead of avoiding them completely, keep your intake consistent.
  • Alcohol can increase bleeding risks, so moderation is key.

Avoid Certain Medications & Supplements 

Some over-the-counter drugs and supplements can interfere with blood thinners, so check with your doctor before taking anything new.

What Should You Do if You Start Bruising or Bleeding More Easily While on Blood Thinners?

If you start experiencing unusual bruising or bleeding while on blood thinners, it is important to:

  • Monitor the symptoms closely and seek medical attention if the bruising or bleeding worsens. This could indicate that your blood thinner dosage is too high or that another issue is present.
  • Report any changes in your health to your healthcare provider, including any new medications or supplements you may have started.
  • Take caution with physical activities to avoid injury. Activities like sports or heavy lifting may increase the risk of bleeding.

Book an Appointment at Pantai Hospitals

Managing blood thinners requires expert guidance, our experienced specialists develop personalised treatment plans to ensure the safe and effective use of blood thinners. With advanced facilities for accurate testing and monitoring, we help you stay on track with your treatment and minimise risks. Our patient-focused approach ensures you receive tailored advice on diet, medication, and lifestyle adjustments to support your overall health. Your health is our priority. Book an appointment at Pantai Hospitals today to receive the expert care you need for a healthier life or you can also download the MyHealth360 application from Google Play Store or Apple App Store. 

Pantai Hospitals have been accredited by the Malaysian Society for Quality in Health (MSQH) for its commitment to patient safety and service quality.

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