Acetaminophen, Aspirin And Ibuprofen Considerations Before Surgery
In our latest question and answer, the pharmacist discusses some considerations for over-the-counter analgesic use before surgery.

Question
I'm having surgery in two days. I have stopped ibuprofen and aspirin, but is it okay to keep taking Tylenol for pain before surgery (except on the day of surgery, of course)?

Answered by Dr. Brian Staiger, PharmD
Medical Content Reviewed By HelloPharmacist
Staff
Last updated Apr 26, 2025
Key points
- Before surgery, consult your doctor about medication management, as everyone's situation is unique and requires personalized advice based on medical history.
- Follow your surgeon's recommendations, but typically stop NSAIDs and aspirin about one week before elective surgery to minimize bleeding risk. Tylenol (acetaminophen) is generally safe to use before surgery and does not affect platelet function.
Answer
Hello, and thank you for reaching out!
If you're preparing for a surgical procedure, it's important to consult your doctor regarding your medication management. While there are general recommendations, each patient's situation is unique, and specific factors need to be considered. Your doctor, knowing your medical history best, should provide tailored advice.
Considerations for Using Over-The-Counter Analgesics Before Surgery
You're correct that, in most cases, NSAIDs like ibuprofen and aspirin should be discontinued before surgery. However, exceptions exist. For example, aspirin may need to be continued in patients at high risk for perioperative occlusive vascular complications, like those undergoing a coronary artery bypass graft. Therefore, it's crucial to seek personalized advice from your doctor.
The risk with NSAIDs, like ibuprofen (brand names Advil, Motrin) and naproxen (brand name Aleve), is that they exert an 'antiplatelet' effect by reversibly inhibiting cyclooxygenase (COX)-1, leading to reduced thromboxane A2 (TxA2) production. TxA2 is released by platelets in response to various stimuli and promotes platelet aggregation. Reducing TxA2, therefore, increases the risk of bleeding.
Aspirin also inhibits cyclooxygenase, but in an irreversible way, and the antiplatelet effects last much longer when compared to NSAIDs.
The length of time before surgery to stop NSAID and aspirin use varies, but it's essential to note that their antiplatelet effects last longer than their pain-relieving effects. For instance, while ibuprofen may relieve pain for 4-6 hours per dose, its antiplatelet effects persist for at least 24 hours. For aspirin, the antiplatelet effects can last up to one week.
While following your surgeon's recommendations is crucial, most healthcare providers advise stopping all NSAIDs about one week before surgery to minimize bleeding risk.
Unlike NSAIDs, Tylenol (acetaminophen) doesn't affect platelet function, making it advantageous for perioperative use, and can often be taken up to the time of your surgery.
Final Thoughts
To reiterate, it's crucial to discuss your specific situation with your doctor and adhere closely to their recommendations for the best surgical outcome.
Nevertheless, as a general guideline, aspirin and NSAIDs should be discontinued approximately one week before surgery (with exceptions, so seek personalized advice). Tylenol (acetaminophen) is generally safe to use before surgery.
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Dr. Brian Staiger, PharmD
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