5 mg daily for 4 mth, up to 15 mg daily may be necessary in malabsorption states. Prophylaxis of megaloblastic anemia of pregnancy 0.2-0.5 mg or up to 1 mg daily. Women of childbearing potential at high risk of having a pregnancy affected by neural tube defect Initially 4 or 5 mg daily before pregnancy & continued through the 1st trimester.
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