What is the formula for parenteral iron therapy in adults?: (A) 4.4. x body weight (kg) x Hb deficit (g/dl), (B) 3.3. x body weight (kg) x Hb deficit (g/dl), (C) 2.2 x body weight (kg) x Hb deficit (g/dl), (D) 1.1 x body weight (kg) x Hb deficit (g/dl)
Answer is A. Parenteral iron therapy needs calculation of the iron requirement of the patient. Iron requirement (mg) = 4.4 x body weight (kg) x Hb deficit (g/dl). This formula includes iron needed for replenishment of stores. Iron stores can be replenished in a shoer time by parenteral therapy. Ref: Essentials of Medical Pharmacology by KD Tripathi, 5th edition, Page 549.