<p><strong>Intramuscular</strong>: Adults and older children: For severe hypomagnesemia, 1 to 5 gm (2 to 10 ml of 50% solution) daily in divided doses; administration is repeated daily until serum levels have returned to normal. If deficiency is not severe, 1 gm (2 ml of 50% solution) can be given once or twice daily. Serum magnesium levels should serve as a guide to continued dosage.<br />
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<strong>Intravenous</strong>: 1 to 4 gm magnesium sulfate (magnesium sulfate (magnesium sulfate injection) injection) may be given intravenously in 10% to 20% solution, but only with great caution; the rate should not exceed 1.5 ml of 10% solution or equivalent per minute until relaxation is obtained.<br />
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<strong>Usual Dose Range</strong>: 1 to 40 gm daily.<br />
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<strong>Electrolyte Replenisher</strong>: Intramuscular 1 to 2 gm in 50% solution four times a day until serum magnesium is within normal limits.<br />
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<strong>Usual Pediatric Dose</strong>:&nbsp;Intramuscular 20 to 40 mg per kg of body weight in a 20% solution repeated as necessary.<br />
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<strong>For Eclampsia</strong>: Initially 1 to 2 gm in 25% or 50% solution is given intramuscularly. Subsequently, 1 gm is given every 30 minutes until relief is obtained. The blood pressure should be monitored after each injection.</p>