Definition of Magnesium sulfate

Magnesium sulfate: A remarkably versatile compound administered intramuscularly and intravenously as an anticonvulsant and as a tocolytic agent (to halt premature labor), taken by mouth as a fast-acting laxative, and applied locally as an anti-inflammatory. Informally called mag sulfate. Also known as Epsom salt.


Last Editorial Review: 6/14/2012

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