Definition Increases in plasma magnesium are often due to excessive intake (magnesium-containing antacids or laxatives) and/or renal impairment. Iatrogenic hypermagnesemia can also occur during magnesium sulfate therapy for gestational hypertension in the mother as well as the fetus. Less common causes include adrenal insufficiency, hypothyroidism, rhabdomyolysis, and lithium administration. Clinical manifestations typically are hyporeflexia, sedation, […]