Used as a laxative to relieve constipation by drawing water into the intestines and stimulating bowel movement. Commonly used in emergency medicine to treat magnesium deficiency, especially in cases of hypomagnesemia. Administered intravenously to manage seizures in pregnant women with preeclampsia or eclampsia. Also utilized in treating certain cardiac arrhythmias, such as torsades de pointes, due to its stabilizing effect on heart rhythm. Applied externally in bath salts to soothe sore muscles and reduce inflammation. Used in agriculture as a foliar spray to correct magnesium deficiency in plants. Employed in brewing and fermentation processes to adjust mineral content and support yeast activity.