Medications play a critical role in your daily health—but in the context of surgery, they can also pose serious risks if not managed carefully. During your pre-op clearance process, your care team will review every …
Medications and Pre‑Op Clearance
Medications play a critical role in your daily health—but in the context of surgery, they can also pose serious risks if not managed carefully. During your pre-op clearance process, your care team will review every prescription, over-the-counter drug, and supplement you take to determine what’s safe to continue and what should be temporarily stopped. This step is essential to prevent bleeding, organ stress, or dangerous drug interactions during surgery.
Why medication review is crucial before surgery
Your body responds differently to medications when under anesthesia or recovering from surgical trauma. Some drugs may:
- Increase the risk of excessive bleeding
- Interfere with anesthesia
- Suppress immune function
- Affect blood sugar or blood pressure regulation
- Prolong recovery or impair wound healing
That’s why a full medication list—including supplements and herbal products—is reviewed during pre-op clearance to ensure a safer experience.
Common medications that may need adjustment
Not every medication will need to be stopped, but certain drug classes often require changes before surgery:
- Blood thinners:
Medications like aspirin, warfarin, clopidogrel, or newer agents (e.g., apixaban, rivaroxaban) may be paused days before surgery to reduce bleeding risk. - Diabetes medications:
Insulin and oral agents such as metformin may need adjustment or temporary discontinuation the morning of surgery to prevent blood sugar crashes or lactic acidosis. - ACE inhibitors and ARBs:
Blood pressure medications such as lisinopril or losartan may be withheld on the day of surgery to avoid blood pressure drops under anesthesia. - NSAIDs and anti-inflammatory drugs:
Ibuprofen, naproxen, and similar medications can interfere with blood clotting and may be paused several days before surgery. - Herbal supplements and vitamins:
Products like garlic, ginseng, ginkgo biloba, and vitamin E can affect bleeding and sedation. Many should be stopped at least 1–2 weeks before surgery.
Medications typically continued before surgery
Some medications are essential and usually continued, even on the day of surgery:
- Beta blockers for heart rate or blood pressure
- Thyroid medications
- Anti-seizure medications
- Certain psychiatric or anti-anxiety drugs (with approval)
- Inhalers or bronchodilators for asthma or COPD
Always follow your provider’s exact instructions—never stop medications on your own.
How to prepare for your medication review
To help your team give you safe and accurate guidance:
- Bring a current list of all medications, including doses and timing
- Include over-the-counter drugs, supplements, and herbal products
- Mention any recent changes to your prescriptions
- Disclose any history of side effects or allergic reactions
- Inform your team if you missed doses or plan to refill a prescription soon
This information is essential for your anesthesiologist and surgical team to plan accordingly.
Special considerations for certain patients
- Patients on long-term steroids: May need a supplemental dose before surgery to avoid adrenal issues
- Those taking psychiatric medications: Must review risk of withdrawal or interaction with anesthesia
- Organ transplant recipients or immunosuppressed patients: Medication timing may need careful coordination with specialists
If you’re seeing multiple providers, coordination is key. Your surgical team may consult with your cardiologist, endocrinologist, or primary care provider to finalize a clearance plan.
Frequently Asked Questions
When should I stop taking blood thinners before surgery?
This depends on the medication. Some are stopped 5–7 days in advance, while others just 24–48 hours. Your provider will give you a personalized timeline.
Can I take my morning medications on the day of surgery?
Often yes—but only with a sip of water and only for approved medications. You’ll be given a list of what’s allowed the day before your procedure.
Are over-the-counter medications a concern?
Yes. Common drugs like ibuprofen, aspirin, or even certain cold medications can impact bleeding or sedation. Include them in your pre-op review.
What happens if I forget to mention a supplement or drug?
It could increase your risk of complications. Always be thorough. If you remember after your appointment, call your provider immediately.
