Table 1:

Trend of laboratory measurements in a 47-year-old woman with warfarin and acetaminophen interaction

TimelineINRHemoglobin, g/L
2 months before admission2.5126
Day 1 (on presentation)> 5.0101
Day 2 (16 h postadmission)9.278
Day 2 (20 h postadmission, 2 h after warfarin reversal)0.9NA
Day 2 (24 h postadmission, 6 h after PRBC transfusion)NA91
Day 3 (morning)1.283
Day 3 (evening)1.077
Day 41.375
Day 51.271
Day 61.274
Day 71.274
Day 8 (warfarin restarted)1.176
Day 101.289
Day 111.497
Day 121.891
Day 131.9NA
Day 142.1NA
Day 152.399
Day 162.5NA
  • Note: INR = international normalized ratio, NA = not available, PRBC = packed red blood cells.