Megaloblastic anaemia may be caused by all of the following except: (A) Phenytoin, (B) Methotrexate, (C) Pyrimethamine, (D) Amoxicillin
Answer is D. <p>Phenytoin decreases folate absorption & increases its excretion causing megaloblastic anaemia.</p><p>Methotrexate is folate antagonist </p><p>Pyrimethamine in high doses causes megaloblastic anaemia,especially in those with marginal folate stores.</p><p>Reference :Tripathi essentials of medical pharmacology 7th edition</p>