In the Pritchard regimen of magnesium sulfate administration followed in most Indian teaching hospitals, the intramuscular loading dose consists of:

• A 4 g IV alone over 5 minutes
• B 4 g IV slowly plus 10 g IM, 5 g in each buttock ✓
• C 6 g IV infusion over 20 minutes only
• D 10 g IM alone, divided between both buttocks

Explanation

The Pritchard regimen gives 4 g of 50 percent magnesium sulfate intravenously slowly over 5 minutes along with 10 g intramuscularly, 5 g into each buttock using a 20 percent solution, followed by maintenance of 5 g IM every 4 hours in alternating buttocks. The pure intravenous 4 g load belongs to the Zuspan regimen, and the 6 g IV loading with 2 g per hour maintenance is the standard IV protocol, so both are correct regimens but not the Pritchard schedule.

Reference: Williams Obstetrics, 26th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.