Gynaecology & Obstetrics Respiratory depression develops when magnesium sulphate concentration reaches: A 5-7 mEq/L B 7-10 mEq/L C >10 mEq/L D >25 mEq/L 💡 Explanation Respiratory depression develops when magnesium sulphate concentration reaches: ✓ Correct Answer: C. >10 mEq/L