Key takeaways
Magnesium sulfate and magnesium citrate are both medications that contain magnesium and are used to treat different conditions. Magnesium sulfate is an electrolyte given by injection, often in hospitals, to treat low magnesium levels and prevent seizures in preeclampsia-eclampsia. It is also used off-label for conditions like torsades de pointes and severe asthma exacerbations. On the other hand, magnesium citrate, available under the brand name Citroma, is an oral saline laxative used to relieve occasional constipation. Magnesium sulfate is prescription-only, while magnesium citrate is available over-the-counter. Magnesium sulfate is generally well-tolerated with few side effects, such as flushing or low blood pressure if administered too quickly. In contrast, magnesium citrate can cause nausea, stomach pain, and diarrhea. Both medications should be used cautiously if you have kidney problems or electrolyte imbalances. Additionally, magnesium citrate can interact with other medications, so it's important to separate its use from other medications by at least two hours.
