5th March 2024

A primigravida, weighing 78 kg, presents with preterm labour.

A primigravida, weighing 78 kg, presents with preterm labour. The obstetrician prescribes magnesium sulphate 4 grams intramuscular as a loading dose, followed by a maintenance dose of 1 gram per hour. The available strength of magnesium sulphate injections is 50%.

Calculate the volume of the given injection in millilitres that should be administered to the patient for the loading dose.