Prescription
Mineral supplement and anticonvulsant
Magnesium sulfate
Last reviewed April 2026
Who is this for?
What is this drug?
Magnesium sulfate is a mineral medicine that works by replacing low magnesium levels in the body and by calming overactive nerves and muscles, which helps prevent seizures and relax muscles.
What is it used for?
Seizures during pregnancy (eclampsia)dangerously high blood pressure in pregnancy (pre-eclampsia)low magnesium in the bloodsevere asthma attacksconstipation (when taken by mouth)irregular heartbeat
Prescription Required
A doctor's prescription is required to obtain this drug legally.