Sometimes you need an in-your-face reminder about certain critical issues regarding a patient. We used to put a bright red sticker on the old paper charts, and there was no overlooking it.
This one falls in the "work around category":
Go to the patient's chart, summary page, and on the right side, use the "Alerts and Directives" section. Click "Add/edit" and in the window that opens, click "Add new", select Level "high". Under "Name" put "Anti-coagulated" (or just select "Alert") and under "Details" put "On Coumadin". Save it and close the chart.
This does not show in the chart but is pretty eye-catching when you select the patient in the patient list.