With oral iron therapy, rise in Hb% can be seen after:
Rise in hemoglobin with oral iron – 0.7 gm-1 gm per week, which is seen after 3 weeks of initiation of oral therapy.
(According to COGDT, 10/ed, p 407 — Hemoglobin levels should increase by atleast 0.3g/dl/week if the patient is responding to therapy)
If there is no significant clinical or hematological improvement within 3 weeks, diagnostic re-evaluation is needed.
1 week
3 weeks
4 weeks
6 weeks