This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Medical, surgical and gynaecological illness complicating pregnancy, Subject name: Gynaecology & Obstetrics
How much iron a patient can tolerate at a time given intravenously 
Select and explain. 
A. 1000 mg, B. 2000 mg, C. 2500 mg, D. 3000 mg
C: 2500 mg
Answer: C: 2500 mg 
Explanation: The dose of parenteral iron is calculated using formula 4.4 x body weight(kg) x Hb deficit If the dose is more than 50ml (each ml has 50mg of iron i.e. 2500mg iron) then half the dose is given on day one and second half on next day. Thus maximum amount is 2500mg Reference: Dutta Obstetrics 7th edition Page no: 269