Gynaecology & Obstetrics Which of the following is the earliest sign of magnesium toxicity in a patient with eclampsia on treatment with magnesium sulphate: A Loss of deep tendon reflexes B Respiratory depression C Cardiac arrest D Decreased urine output 💡 Explanation Which of the following is the earliest sign of magnesium toxicity in a patient with eclampsia on treatment with magnesium sulphate: ✓ Correct Answer: A. Loss of deep tendon reflexes