Comparative Pharmacology
Head-to-head clinical analysis: MAGNESIUM SULFATE IN DEXTROSE 5 IN PLASTIC CONTAINER versus SODIUM CHLORIDE 0 45 IN PLASTIC CONTAINER.
Peer-Reviewed Evidence
Head-to-head clinical analysis: MAGNESIUM SULFATE IN DEXTROSE 5 IN PLASTIC CONTAINER versus SODIUM CHLORIDE 0 45 IN PLASTIC CONTAINER.
MAGNESIUM SULFATE IN DEXTROSE 5% IN PLASTIC CONTAINER vs SODIUM CHLORIDE 0.45% IN PLASTIC CONTAINER
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Magnesium sulfate provides magnesium ions, which are essential for various physiological processes. It acts as a cofactor for enzymatic reactions, stabilizes excitable membranes, and antagonizes calcium entry at the neuromuscular junction, leading to reduced acetylcholine release and muscle relaxation. In the CNS, it may act as a noncompetitive antagonist of NMDA receptors, exerting anticonvulsant effects.
Sodium chloride 0.45% (half-normal saline) is an isotonic crystalloid solution that provides sodium and chloride ions to maintain or restore extracellular fluid volume. It expands intravascular volume, corrects electrolyte imbalances, and can dilute plasma osmolality. The chloride component helps maintain acid-base balance.
1 to 4 g intravenously as a 5% to 20% solution, rate not exceeding 150 mg/min; dosing frequency depends on indication (e.g., preeclampsia/eclampsia: 4-5 g IV loading then 1-2 g/hr infusion; hypomagnesemia: 1-2 g IV over 1-2 hours, may repeat based on serum magnesium levels).
Intravenous; adult: 500-1000 mL at a rate of 50-100 mL/hour (maintenance); adjust based on fluid and electrolyte status.
None Documented
None Documented
Terminal half-life approximately 4-5 hours in normal renal function; prolonged in renal impairment (up to 40 hours).
Not applicable; sodium and chloride ions are endogenous substances with rapid renal regulation; no defined half-life.
Primarily renal (90-100% as unchanged magnesium). Less than 1% biliary/fecal.
Renal: >90% as sodium and chloride ions; negligible biliary/fecal elimination.
Category C
Category A/B
Electrolyte
Electrolyte