Nalepsin IV - Infusion Magnesium Sulphate 4% infusion - 1 100ml vial(s) / 100ml vial Beximco Pharmaceuticals Ltd. Indication: Convulsions of eclampsia, pre-eclampsia Adult Dose: Eclampsia Severe pre-eclampsia or eclampsia The total initial dose is 10 to 14 g of magnesium sulfate. To initiate therapy, 4 g of Magnesium Sulfate in 5% Dextrose Injection, may be administered intravenously. The rate of I.V. infusion should generally not exceed 150 mg/minute, or 7.5 mL of a 2% concentration (or its equivalent) per minute, except in severe eclampsia with seizures. Simultaneously, 4 to 5 g (32.5 to 40.6 mEq) of magnesium sulfate may be administered intramuscularly into each buttock using undiluted 50% Magnesium Sulfate Injection. After the initial I.V. dose, some clinicians administer 1-2 g/hour by constant I.V.... Contraindication: Heart block, severe renal impairment, myocardial damage. Mode of Action: Magnesium sulfate decreases levels of acetylcholine in motor nerve terminals. It also acts on the myocardium by decreasing the rate of SA node impulse formation and prolonging the conduction time. Precaution: Renal impairment, myasthaenia gravis, digitalised patients; pregnancy. Monitor serum-magnesium concentrations. Side Effect: Hypermagnesaemia characterised by nausea, vomiting, flushing, thirst, hypotension, drowsiness, confusion, slurred speech, double vision, bradycardia, muscle weakness. Hypocalcaemia; paralytic ileus. Interaction: Enhances neuromuscular blockers, digitalis glycosides.