Should you take aspirin before surgery?
It depends on why you take aspirin and what kind of surgery you’re having. Aspirin can increase bleeding risk during and after an operation, but stopping it can raise the risk of blood clots in people who use it to prevent cardiovascular events (for example, after a heart attack, stroke, stent, or for established coronary artery disease). The decision is made case-by-case with your surgeon and prescribing clinician.
What happens if you stop aspirin before surgery?
If you stop aspirin abruptly, some patients—especially those taking it for heart or stroke prevention—may have higher risk of clotting complications around the time of surgery. The exact risk depends on your underlying condition, the type of surgery, and how soon the aspirin is resumed after the procedure. Your medical team may choose to continue aspirin, switch to a different plan, or stop it for a defined number of days.
How many days before surgery should aspirin be stopped?
There isn’t one universal rule. Many protocols use a “stop several days before” approach when aspirin is held because platelets need time to regenerate, but the correct timing varies by:
- the reason you take aspirin (primary vs secondary prevention)
- your bleeding risk and the surgery type (minor vs high-bleeding procedures)
- anesthesia/surgical technique
- whether you have a stent or recent cardiovascular event
Only your surgeon and the clinician who prescribes aspirin can set the safest schedule for you.
Do minor procedures (dental, cataract, skin surgery) change aspirin plans?
Sometimes they do not. For many minor procedures, clinicians may continue aspirin because stopping it can create clot risk while the procedure’s bleeding risk is limited and manageable. For other procedures, even if they are “small,” bleeding in a specific location (for example, around the eye or certain neurosurgical contexts) can change the plan. Ask your procedural team what they want you to do for that exact appointment.
What if you take aspirin plus other blood thinners?
Combination therapy matters. If you also take medicines such as clopidogrel (Plavix), warfarin, apixaban (Eliquis), rivaroxaban (Xarelto), dabigatran, or heparin, the perioperative plan usually changes. Some combinations require holding one or more drugs or using bridging strategies for high-risk clot patients. Tell your team every medication and supplement you use.
Should aspirin be stopped for all surgeries?
No. Many patients stay on aspirin for operations where the clot-risk outweighs the bleeding-risk, including some cardiac and vascular situations. The plan is not one-size-fits-all; it’s risk balancing guided by your diagnosis and the surgical bleeding risk.
What side effects or symptoms should you watch for around surgery?
If aspirin is continued, watch for unusual or persistent bleeding (for example, heavy wound bleeding, worsening bruising, black stools or vomiting blood). If aspirin is held, seek urgent help if you develop symptoms of clotting such as chest pain, shortness of breath, one-sided weakness, trouble speaking, or severe leg swelling. Follow your facility’s post-op instructions for when to call.
What should you tell your surgeon on the day you schedule surgery?
Bring or list:
- the dose of aspirin (e.g., 81 mg vs 325 mg)
- why you take it (heart attack/stent/stroke vs prevention)
- when you last took a dose
- other blood thinners and NSAIDs (ibuprofen/naproxen)
- any history of bleeding or anemia
If you want, I can help you get a precise answer
Reply with: (1) why you take aspirin, (2) your aspirin dose, (3) the type of surgery/procedure, and (4) any other blood thinners you take. I can then explain the typical decision factors your surgeon will use and what questions to ask.