What patients should know about pausing anticoagulant or antiplatelet medication before treatment
Blood thinners, such as anticoagulants and antiplatelet medicines, are frequently prescribed to prevent strokes, heart attacks, and blood clots. When someone is preparing for orthopaedic surgery or a guided injection procedure, these medicines can make it harder to control bleeding.
This guidance explains:
- Why these medicines are sometimes paused
- Typical timing for different medication types
- Important safety considerations
- The support patients should expect throughout the process
Any changes must always be guided by your clinical team.
Why adjustments are sometimes required
Blood thinners reduce the blood’s ability to clot. While this is vital for preventing harmful clots, it can:
- Increase bleeding during surgery
- Slow down wound healing
- Raise the risk of postoperative bruising or swelling
Pausing medication temporarily helps balance safety during the procedure with ongoing protection against clotting.
Typical timing for pausing different medicines
Your surgeon and prescribing clinician will advise you personally. However, commonly used medical guidance gives the following examples:
- Oxford University Hospitals NHS Foundation Trust1 notes that warfarin is often paused about 5 days before surgery to allow clotting levels to normalise.
- Right Decisions Scotland2 explains that direct oral anticoagulants (DOACs), including apixaban and rivaroxaban, are usually paused around 48 hours before surgery when kidney function is normal.
- Surgical Neurology International3 highlights that antiplatelet medicines such as aspirin or clopidogrel may need stopping 7 to 10 days before higher-risk procedures.
These recommendations will be tailored based on your medical history and the type of orthopaedic procedure planned. See below the typical guidance for commonly used blood thinners:
Most common anticoagulants and antiplatelet medicines
|
Drug |
Also Known As |
Type |
When to STOP |
|
Aspirin |
Nu-Seals, Cartia, Disprin |
Antiplatelet |
7 days before surgery |
|
Clopidogrel |
Plavix |
Antiplatelet |
7 days before surgery |
|
Rivaroxaban |
Xarelto |
DOAC (Factor Xa) |
48 hours before surgery |
|
Apixaban |
Eliquis |
DOAC (Factor Xa) |
48 hours before surgery |
|
Dabigatran |
Pradaxa |
DOAC (Thrombin inhibitor) |
48–72 hours prior (longer if kidney problems) |
Additional anticoagulants that may require different timings
|
Medication |
Common Name |
Stop Before Procedure |
|
Warfarin |
Marevan |
5 days (INR blood test required) |
|
Edoxaban |
Lixiana |
48 hours |
|
Enoxaparin |
Clexane |
24 hours |
|
Dalteparin |
Fragmin |
24 hours |
|
Fondaparinux |
Arixtra |
36–42 hours |
|
Dipyridamole |
Persantin |
48–72 hours |
|
Ticagrelor |
Brilique |
5 days |
Note: These timings are examples only. Actual instructions will be based on your type of procedure, overall health, and monitoring requirements.
When extra caution is needed
Some patients must not stop blood thinners without specialist guidance, including those with:
- Mechanical heart valves
- Recent coronary stents or heart attack
- Atrial fibrillation
- A history of stroke, DVT, or pulmonary embolism
The British Society for Haematology4 emphasises that stopping anticoagulation incorrectly can increase the risk of serious clotting complications.
In higher-risk cases, your clinical team may involve a cardiologist or haematologist and may use short-acting “bridging” medication to maintain protection.
Restarting medication after the procedure
When blood thinners can be safely restarted depends on:
- Bleeding risk from the surgery
- How healing is progressing
- Mobility and hydration
- Surgeon assessment
Restarting may occur 24 hours post-procedure or later, depending on individual risk.
Support you should expect from your provider
A high-quality orthopaedic provider will:
- Record and review all medications early in your care
- Coordinate with your GP or anticoagulation clinic where needed
- Give you clear written instructions for stopping and restarting medicines
- Monitor your progress and wound healing after surgery
- Provide a dedicated point of contact for questions or concerns
At Orthopaedic Innovation, our Patient Support Team plays an active role throughout your journey. They help schedule appointments, communicate medical instructions clearly, and ensure you always know who to contact for reassurance or guidance; from the moment your procedure is planned through to full recovery.
This coordinated approach supports both safety and confidence. Read more about our team in our blog: Beyond the Clinic: What Makes Our Concierge Team Unique?
Key takeaways
- Blood thinners are sometimes paused before orthopaedic procedures to manage bleeding risk
- Timing varies based on the medicine, your health and the surgery type
- Medication changes must always be planned by healthcare professionals
- Early communication ensures smoother, safer surgical planning
- You should always feel fully supported and informed throughout the process
If you take any blood-thinning medication and are scheduled for a procedure, tell your care team as early as possible so a safe and appropriate plan can be made.
Have questions about your medication before surgery?
Our Patient Support Team is here to answer questions and coordinate your care. Get in Touch
1 https://www.ouh.nhs.uk/media/5iuirfdz/90700panticoagulants.pdf
