<prompt> Magnesium sulphate toxicity include all EXCEPTLoss of Patellar reflexOliguriaRespiratory depressionCardiac arrest  <response>: MgSo4 acts by inhibition of neuromuscular transmission. NOTE: we monitor urine output while patient is on MgSO4, not because it is a sign of MgSO4 toxicity, but because oliguria is secondary to PIH glomerular endotheliosis and decreased urine output would decrease MgSO4 clearance and increase risk of toxicity. 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 