Patient INR levels
| DATE IN 2013 | INR | EVENT |
|---|---|---|
| November 26 | 3.0 | NA |
| December 10 | 3.5 | NA |
| December 13 | NA | Patient starts taking the multivitamin |
| December 17 | > 10.0 | Community laboratory measurement |
| December 17 | > 10.0 | Hospital laboratory measurement |
| December 18 | 6.2 | Measurement after taking 5 mg of oral vitamin K* |
| December 20 | 1.7 | INR returns to normal and warfarin is restarted |
INR—international normalized ratio, NA—not applicable.
↵* Multivitamin is discontinued.