Warfarin, Ibuprofen, Ginkgo, and a Fasting Patient
Mr. R, 68, is scheduled at 11:00 a.m. for a shave biopsy of a forearm lesion. His chart lists warfarin (INR 2.6 drawn yesterday), metformin, lisinopril, and atorvastatin. While rooming him you see bruising on both forearms. He mentions he has taken ibuprofen 400 mg three times daily for six days for knee pain, plus a capsule a friend gave him that contains ginkgo. He has had nothing to eat or drink since 9:00 p.m. because the paper said fasting, and he feels a little lightheaded. The provider is running 20 minutes behind.
1. What must be escalated to the provider before the procedure, and why?
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Everything in this rooming note is a stop-and-tell item:
- Bleeding risk stack: warfarin plus six days of ibuprofen (antiplatelet effect plus gastric mucosal injury) plus ginkgo (inhibits platelet aggregation). The bruising is the visible signal that this is already happening.
- INR 2.6: therapeutic for warfarin alone, but the provider needs it alongside the new agents before cutting.
- Lightheadedness after 14 hours of fasting: on metformin, with lisinopril on board, this could be hypoglycemia, dehydration, or orthostasis. Get vitals, orthostatics, and a point-of-care glucose if that test is within the office's waived scope.
- The fasting itself may be unnecessary. Shave biopsy typically requires no fasting; the patient may have skipped meals and doses for nothing, which itself changes his status today.
Report in person or by direct flag - not a sticky note on the door. State findings, not conclusions: 'Bruising, NSAID use six days, ginkgo, lightheaded, glucose is X.'
2. What may the medical assistant do, and not do, in the next 20 minutes?
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May do: repeat vital signs, orthostatic blood pressures, and pulse oximetry; obtain a point-of-care glucose if within the office's waived testing scope; ask a structured medication and supplement history including dose and last dose; inspect and describe the bruising; keep him seated and safe; document findings and the time the provider was notified.
Must not do: tell him to stop warfarin, skip a dose, or stop the ibuprofen; tell him the biopsy will or will not be cancelled; advise him to eat or drink against the written instruction without provider direction; or reassure him that ginkgo is harmless. Those are clinical decisions.
Framing for the patient: 'I've noted the bruising, the ibuprofen and the ginkgo, and how you're feeling. The provider will review all of this with you before anything is done.' That is honest, keeps him cooperative, and does not promise an outcome you cannot deliver.
3. Draft the key teaching points and the documentation for this visit.
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Teaching points (after the provider's decision, reinforced by the MA):
- Warfarin interacts with many over-the-counter products - ibuprofen, aspirin, and ginkgo among them - and the combination raises bleeding risk.
- Check with the office before starting any OTC drug, herbal product, or supplement; bring the actual bottles to visits.
- Bleeding precautions: report black stools, blood in urine, unusual headache, or bruising that spreads.
- Clarify the fasting instruction: for this procedure, the written instruction and the provider's actual requirement may not match; call the office rather than guess.
Documentation: bruising location and size; full medication and supplement list with doses and durations; vitals including orthostatics; glucose value if done; patient's report of lightheadedness; time and method of provider notification; provider's decision and the patient's response; all education delivered and the patient's teach-back.