Magnesium sulfate: past, present, and future

Area of Science:

• Obstetrics and Gynecology
• Pharmacology
• Neurology

Background:

• Magnesium sulfate has a long history in obstetric practice, originating from early 20th-century anecdotal use for eclamptic seizures.
• It remains a cornerstone medication in contemporary obstetrics, with extensive research over 95 years.

Purpose of the Study:

• To review the historical use of magnesium sulfate in obstetrics.
• To summarize the evidence regarding its efficacy in eclampsia, preeclampsia, preterm labor, and cerebral palsy prevention.
• To discuss the controversies, proposed mechanisms of action, and safety considerations.

Main Methods:

• Literature review of studies investigating magnesium sulfate's efficacy and safety in obstetric conditions.
• Analysis of evidence supporting its use in eclampsia, preeclampsia, preterm labor, and neuroprotection.
• Examination of physiological and pharmacodynamic aspects of magnesium sulfate.

Main Results:

• Strong evidence supports magnesium sulfate as the drug of choice for preventing and treating eclampsia with severe disease.
• Evidence does not conclusively show superior efficacy of magnesium sulfate over other tocolytics for preterm labor.
• The role of magnesium sulfate in preventing cerebral palsy lacks consistent supporting evidence.

Conclusions:

• Magnesium sulfate is definitively indicated for eclampsia management.
• Its utility in preterm labor and as a neuroprotective agent requires further investigation.
• Understanding magnesium sulfate's physiology is crucial for optimizing its clinical application and safety.