<prompt> All of the following cause macrocytic anaemia, except -PrimaquineMethotrexateTrimethoprinAzathioprine  <response>: Ans. is a i.e., Primaquine Some impoant drugs causing megaloblastic anaemia o Methotrexate o Phenobarbitone o Zidovudine o Triamterene o Trimethoprim o Phenytoin o Pentamidine o 5-Fluorouracil o Primidone o Azathioprine Cytosine arabinoside 