RT Book, Section A1 Meier, Kathryn H. A2 Olson, Kent R. A2 Anderson, Ilene B. A2 Benowitz, Neal L. A2 Blanc, Paul D. A2 Clark, Richard F. A2 Kearney, Thomas E. A2 Kim-Katz, Susan Y. A2 Wu, Alan H. B. SR Print(0) ID 1174606316 T1 MAGNESIUM T2 Poisoning & Drug Overdose, 7e YR 2018 FD 2018 PB McGraw-Hill Education PP New York, NY SN 9780071839792 LK accessmedicine.mhmedical.com/content.aspx?aid=1174606316 RD 2024/10/07 AB Magnesium (Mg) is a divalent cation that is required for a variety of intracellular processes and is an essential ion for proper neuromuscular functioning. Oral magnesium salts are widely available in over-the-counter antacids (eg, Maalox and Mylanta) and cathartics (milk of magnesia and magnesium citrate and sulfate). IV magnesium sulfate is used to treat toxemia of pregnancy, polymorphous ventricular tachycardia, refractory ventricular arrhythmias, and severe bronchospasm.