<prompt> Which of the following is the earliest sign of magnesium toxicity in a patient with eclampsia on treatment with magnesium sulphate:Loss of deep tendon reflexesRespiratory depressionCardiac arrestDecreased urine output  <response>: -During Magnesium toxicity, the first reflex to be lost is patellar reflex loss of knee jerk -While giving MgSO4 things should be monitored are as follows; Respiratory rate should be at least more than 12 Output should be more than 100 ml 4hrs Knee jerks should be present Serum Mg2 levelsmeql Clinical effects 4-7 Normal therapeutic level 8 - 10 Patellar reflex disappear 10-15 Respiratory depression 12-15 Respiratory paralysis 25 - 30 Cardiac arrest 