Comparative Pharmacology
Head-to-head clinical analysis: DEXTROSE 5 SODIUM CHLORIDE 0 2 AND POTASSIUM CHLORIDE 20MEQ versus MAGNESIUM SULFATE.
Peer-Reviewed Evidence
Head-to-head clinical analysis: DEXTROSE 5 SODIUM CHLORIDE 0 2 AND POTASSIUM CHLORIDE 20MEQ versus MAGNESIUM SULFATE.
DEXTROSE 5%, SODIUM CHLORIDE 0.2% AND POTASSIUM CHLORIDE 20MEQ vs MAGNESIUM SULFATE
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Dextrose 5% provides calories and fluid for hydration; sodium chloride 0.2% replaces sodium and chloride ions to maintain electrolyte balance; potassium chloride 20 mEq replaces potassium to maintain intracellular ion concentrations and nerve/muscle function.
Magnesium sulfate acts as a physiological calcium channel blocker. It inhibits calcium influx into presynaptic nerve terminals, reducing acetylcholine release at the neuromuscular junction and decreasing muscle contraction. It also antagonizes NMDA receptors and stabilizes neuronal membranes.
Intravenous infusion at a rate of 100-125 mL/hour, providing 5 g dextrose, 0.2 g sodium chloride, and 20 mEq potassium chloride per liter. Typical adult dose is 1 L every 8-12 hours, adjusted for electrolyte needs and fluid status.
IV: Loading dose 4-6 g over 20-30 minutes, followed by maintenance infusion 1-2 g/hour for seizure prophylaxis in severe preeclampsia/eclampsia. IM: 4-8 g deep IM initially, then 4 g every 4 hours as needed.
None Documented
None Documented
Dextrose: ~2 hours for glucose; Sodium and chloride: not applicable; Potassium: ~12 hours (terminal) in normokalemia, prolonged in renal impairment.
Terminal elimination half-life approximately 4-6 hours in patients with normal renal function; prolonged to 12-24 hours or more in renal impairment, necessitating dose adjustment
Renal: Dextrose is metabolized to CO2 and water, not excreted unchanged. Sodium and chloride are excreted renally; potassium is excreted renally (90%) and fecally (10%).
Primarily renal (90-95% as unchanged drug); minor biliary/fecal (<5%)
Category A/B
Category C
Electrolyte
Electrolyte