Back to Questions
OPRA Pharmacokinetics and Pharmacodynamics QUESTION #3833
Question 1
A patient takes ferrous sulphate mixture $300\ \text{mg}/10\ \text{mL}$, dose $10$ mL three times daily. Given $\text{FeSO}_4 \cdot 7\text{H}_2\text{O}\ M_r = 278$ and $\text{Fe}\ M_r = 55.9$, what is the daily elemental iron intake?
  • $3.23$ mg
  • $17.1$ mg
  • $60.0$ mg
  • $181.0$ mg✔️
Correct Answer Explanation
Daily $\text{FeSO}_4 = 300\ \text{mg} \times 3 = 900\ \text{mg}$. Moles $= \dfrac{900}{278} = 3.237\ \text{mmol}$. Elemental Fe $= 3.237 \times 55.9 = 181\ \text{mg}$.