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Data updated: Mar 29, 2026

MAGNESIUM SULFATE

MAGNESIUM SULFATE
Neurology Approved 1986-09-08

Magnesium Sulfate Injection is indicated for replacement therapy in patients with magnesium deficiency, particularly acute hypomagnesemia presenting with signs of tetany. It is also utilized as an additive in total parenteral nutrition (TPN) to prevent or correct magnesium depletion that may arise during the course of therapy. Additionally, the medication is used in obstetric care for the prevention and control of seizures associated with pre-eclampsia and eclampsia.

Source: FDA Label โ€ข ASPIRO

How MAGNESIUM SULFATE Works

The specific mechanism of action for Magnesium Sulfate is not specified in the provided FDA labeling. The source text does not identify a particular biological target or describe the physiological process by which the drug produces its therapeutic effects. Consequently, the exact biological pathway for its use in magnesium replacement or seizure control is not detailed in this documentation.

7
Indications
--
Phase 3 Trials
39
Years on Market

Details

Status
Prescription
First Approved
1986-09-08
Routes
INTRAMUSCULAR, INTRAVENOUS, INJECTION
Dosage Forms
SOLUTION, INJECTABLE

MAGNESIUM SULFATE Approval History

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What MAGNESIUM SULFATE Treats

6 indications

MAGNESIUM SULFATE is approved for 6 conditions since its original approval in 1986. These indications span multiple therapeutic areas including oncology, immunology, and more.

  • Magnesium Deficiency
  • Hypomagnesemia
  • Tetany
  • Seizures
  • Pre-Eclampsia
  • Eclampsia
Source: FDA Label

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Trial Timeline

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Understanding FDA Approval Types
Count Type What it means
- ORIG Original approval - drug first enters market
- SUPPL - Efficacy New indication (new disease/condition approved)
- SUPPL - Labeling Label text changes (warnings, dosing updates)
- SUPPL - Manufacturing Production changes (new facility)
- SUPPL - Chemistry Formulation changes (new dosage strength)

Green lines in the timeline show ORIG and Efficacy approvals - the clinically meaningful milestones.

MAGNESIUM SULFATE FDA Label Details

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Indications & Usage

FDA Label (PDF)

Magnesium Sulfate Injection, USP is suitable for replacement therapy in magnesium deficiency, especially in acute hypomagnesemia accompanied by signs of tetany similar to those observed in hypocalcemia. In such cases, the serum magnesium (Mg++) level is usually below the lower limit of normal (1.5 to 2.5 mEq/liter) and the serum calcium (Ca++) level is normal (4.3 to 5.3 mEq/liter) or elevated. In total parenteral nutrition (TPN), magnesium sulfate may be added to the nutrient admixture to correct or prevent hypomagnesemia which can arise during the course of therapy. Magnesium Sulfate Injecti...

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Data Sources

Data sourced from official FDA and NIH databases. Click links to verify on original sources.