Magnesium helps to steady blood pressure, strengthen bones and manage the rhythm of the heart. People in the United States do not always get enough magnesium in their diet, so for some, supplementation is necessary, according to WebMD.
Magnesium is available in tablet form in various strengths, and some multivitamins include magnesium. People suffering from severe magnesium deficiencies can receive intravenous magnesium or injections of magnesium. IV or injected magnesium is also prescribed for women suffering from eclampsia during pregnancy and for patients experiencing severe asthma attacks. Magnesium also is present in many laxatives and antacids, according to WebMD.
While many Americans do not get the recommended levels of magnesium, severe levels of deficiency are quite rare, occurring most frequently in people suffering from kidney disease, parathyroid problems or Crohn's disease or another digestive ailment. People who abuse alcohol or take drugs for cancer or diabetes are also at risk for a severe magnesium deficiency. Advanced age is another risk factor, as is antibiotic use. People who take proton pump inhibitors such as Nexium, Prilosec, Dexilant, Prevacid, Zegerid, AcipHex or Protonix for acid reflux can also develop a magnesium deficiency over time, making monitoring important for these patients, notes WebMD.