Should you stop aspirin before surgery?
It depends on why you take aspirin and what kind of surgery you’re having. Aspirin can raise bleeding risk, but stopping it can raise the risk of heart attack, stroke, or stent thrombosis in people who take it for cardiovascular disease.
Surgeons and anesthesiologists usually decide case-by-case based on:
- The reason you take aspirin (primary prevention vs prior heart attack/stroke, stents, bypass, certain vascular disease)
- The surgery’s bleeding risk (some procedures tolerate more bleeding than others)
- Your personal bleeding risk and other medicines you take (like anticoagulants or other antiplatelet drugs)
If you take aspirin for heart or stroke prevention, is it ever continued?
Often, yes. People who take aspirin for secondary prevention (for example, prior heart attack, stroke, or coronary stent) are commonly advised to continue aspirin for many surgeries, because the harm from stopping can outweigh the added bleeding risk. Decisions are individualized, especially for operations where bleeding could be dangerous.
If you take aspirin for “primary prevention,” do you usually stop it?
Primary-prevention aspirin (taken only because of risk factors, not because of prior cardiovascular events) is more likely to be stopped before surgery if the procedure has meaningful bleeding risk. The plan is still individualized, but this is a common pattern.
How long before surgery is aspirin stopped (if you do stop it)?
If aspirin is held for bleeding-risk reasons, it’s often stopped several days before the operation to allow platelet function to recover. The exact timing varies by surgeon and procedure type, and your clinician should give the specific stop date.
Does aspirin affect spinal/epidural anesthesia?
Yes. Neuraxial procedures (spinal or epidural anesthesia) are sensitive to bleeding risk because bleeding can have serious consequences. Whether aspirin can be continued depends on dosing and local protocol and should be confirmed with the anesthesia team.
What if you also take blood thinners (warfarin, apixaban, rivaroxaban, clopidogrel)?
Combination therapy changes the risk balance. If you’re on other antiplatelet drugs (like clopidogrel) or anticoagulants, the “aspirin plan” may differ. Your prescriber should coordinate the full medication schedule (not aspirin alone) to avoid excess bleeding or loss of protection.
What happens if you keep aspirin and the surgeon thinks bleeding risk is high?
If aspirin is continued, surgeons may use additional bleeding-control steps and monitor more closely. The key issue is whether the bleeding risk is acceptable for the specific procedure. If not, the team may request holding aspirin and restarting afterward.
What happens if you stop aspirin and you have a heart stent?
Stopping aspirin in someone with a coronary stent can increase the risk of clotting in the stent (which can cause heart attack). If you have a stent, the safest approach is usually a coordinated plan with your cardiologist and surgeon rather than stopping on your own.
When do you restart aspirin after surgery?
Restart timing depends on surgical hemostasis (how well bleeding is controlled), the procedure type, and the reason you take aspirin. Clinicians often restart once bleeding risk is acceptable, but the exact timing varies.
What should patients do right now?
- Do not stop aspirin on your own.
- Tell your surgeon/anesthesiologist exactly why you take it (including prior stent/heart attack/stroke history) and your dose.
- Ask for a specific written plan: whether to continue, if/when to stop, and when to restart.
If you share (1) why you take aspirin, (2) the type of surgery, and (3) whether you’re on any other blood thinners, I can help you frame the typical questions to ask your surgical team and what factors usually drive the decision.