A 65 year old female presents with a
history of breathlessness on exertion and malaise. She has Parkinsonism and
was on treatment for this but was unable to name the drugs she was on. On
clinical examination she was noted to be pale and had features of Parkinsonism
detected on examination of her nervous system.
Hb 8.5 g/dL
WBC 7. 5 x109/L
Platelets 450 x109/L
MCV 109 fl
Reticulocyte count 8%
In this patient which one of the
following drugs is the most likely cause of her anaemia?