A 43 year old female who has
ileocaecal Crohn’s disease attends the gastroenterology clinic and has blood
Hb 31.5 g/dL
RBC 4.32 x1012/L
WBC 1.9 x109/L
Platelets 88 x109/L
The house officer looking through the
results rings you to ask what he should do about them. You ask the house
officer what medication the patient is on .
Which one of the following would
account for these results?