Key takeaways
Magnesium oxide and magnesium citrate are both over-the-counter medications used to address different health issues. They both contain magnesium, but they belong to different medication classes and have distinct uses. Magnesium oxide is an antacid used to relieve heartburn, indigestion, and upset stomach, and it can also serve as a dietary supplement for low magnesium levels. On the other hand, magnesium citrate is a saline laxative used to treat occasional constipation. Magnesium oxide is available in tablet form, while magnesium citrate is a liquid solution. Common side effects of both medications include diarrhea, nausea, and stomach cramping. Both medications should be used cautiously if you have kidney problems, as they can lead to magnesium toxicity or electrolyte imbalances. Both medications should be taken separately from other medications to avoid interactions.
