Optimum Magnesium Gluconate Side Effects
Generic Name: magnesium gluconate
Note: This page contains side effects data for the generic drug magnesium gluconate. It is possible that some of the dosage forms included below may not apply to the brand name Optimum Magnesium Gluconate.
For the Consumer
Applies to magnesium gluconate: liquid, tablets
Check with your doctor if any of these most COMMON side effects persist or become bothersome:
Seek medical attention right away if any of these SEVERE side effects occur while taking magnesium gluconate (the active ingredient contained in Optimum Magnesium Gluconate)
Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); nausea; slow reflexes.
For Healthcare Professionals
Applies to magnesium gluconate: compounding powder, oral liquid, oral tablet
Other side effects have included effects from toxicity (hypermagnesemia). Mild hypermagnesemia is generally well-tolerated. Moderate or severe hypermagnesemia primarily affects the nervous and cardiovascular systems. The effects of hypermagnesemia may be worsened by the presence of hypocalcemia, especially in patients with uremia.[Ref]
Gastrointestinal side effects have included diarrhea. Magnesium toxicity has been associated with nausea (magnesium levels of 4 to 5 mEq/L) and rare cases of paralytic ileus (magnesium levels greater than 5 mEq/L).[Ref]
Nervous system side effects have resulted from the suppression of neuromuscular transmission in the CNS and at the neuromuscular junction by magnesium (antagonized by calcium). The degree of severity of these side effects has been dependent on the serum magnesium level. Clinically, if serum magnesium (Mg) levels increase to 4 to 7 mEq/L, there may be a decrease in tendon reflexes, muscle weakness and/or mental confusion/sedation. At levels of 7 to 10 mEq/L the respiratory rate slows and the blood pressure falls. At levels of 10 to 15 mEq/L there is usually profound mental depression, areflexia, coma and respiratory paralysis. Magnesium also has a curare-like effect at the neuromuscular junction at serum levels above 10 mEq/L. Death is not uncommon when serum magnesium levels rise to 15 mEq/L.[Ref]
The cardiovascular consequences of hypermagnesemia are due to peripheral vasodilation. Hypotension may be observed when serum magnesium levels rise to 7 to 10 mEq/L, becoming severe when serum magnesium levels rise above 10 mEq/L. Magnesium can also depress myocardial conductivity and cause bradyarrhythmias at levels greater than 10 mEq/L. While some patients are inexplicably able to tolerate extraordinary magnesium levels, there is a significant risk of asystole when levels rise to 25 mEq/L. The risk of cardiotoxicity from hypermagnesemia is increased in the presence of hypocalcemia, hyperkalemia, acidosis, digitalis therapy, and renal insufficiency.[Ref]
Cardiovascular side effects have included hypotension, depressed myocardial conductivity, and bradyarrhythmias.[Ref]
Acute hypermagnesemia may cause hypocalcemia due to suppression of the release of parathyroid hormone (PTH) and competition for renal tubular reabsorption between calcium (Ca) and magnesium. The latter can lead to decreased Ca reabsorption and hypercalciuria, which aggravates the hypocalcemia produced by decreased release of PTH.[Ref]
Metabolic side effects have included hypocalcemia.[Ref]
Magnesium (Mg) gluconate is generally well-tolerated.[Ref]
1. "Product Information. Magonate (magnesium gluconate)." Fleming and Company, Fenton, MO.
2. Martin RW, Martin JN Jr, Pryor JA, Gaddy DK, Wiser WL, Morrison JC "Comparison of oral ritodrine and magnesium gluconate for ambulatory tocolysis." Am J Obstet Gynecol 158 (1988): 1440-5
3. Golzarian J, Scott HW, Richards WO "Hypermagnesemia-induced paralytic ileus." Dig Dis Sci 39 (1994): 1138-42
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6. Jenny DB, Goris GB, Urwiller RD, Brian BA "Hypermagnesemia following irrigation of renal pelvis. Cause of respiratory depression." JAMA 240 (1978): 1378-9
7. Schrier RW, Gottschalk CW, Eds. "Diseases of the Kidney, 5th Edition." Boston, MA: Little, Brown and Company 1-3 (1993): 183-2653
8. VanderArk CR, Ballantyne F 3d, Reynolds EW Jr "Electrolytes and the electrocardiogram." Cardiovasc Clin 5 (1973): 269-94
9. Cumming WA, Thomas VJ "Hypermagnesemia: a cause of abnormal metaphyses in the neonate." AJR Am J Roentgenol 152 (1989): 1071-2
10. Neumann L, Jensen BG "Osteomalacia from Al and Mg antacids. Report of a case of bilateral hip fracture." Acta Orthop Scand 60 (1989): 361-2
11. Lembcke B, Fuchs C "Magnesium load induced by ingestion of magnesium-containing antacids." Contrib Nephrol 38 (1984): 185-94
12. Fung MC, Weintraub M, Bowen DL "Hypermagnesemia: elderly over-the-counter drug users at risk." Arch Fam Med 4 (1995): 718-23
It is possible that some side effects of Optimum Magnesium Gluconate may not have been reported. These can be reported to the FDA here. Always consult a healthcare professional for medical advice.
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- Drug class: minerals and electrolytes
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