Overview: Magnesium laxatives are used for occasional constipation. They work by pulling water into your intestines, which makes your poop softer and easier to pass. Diarrhea is a common side effect.

Magnesium citrate helps relieve occasional constipation by increasing water in the stool. Higher doses can cause side effects like diarrhea, cramps, or nausea. People with certain health conditions ...

Lindsay Cook, PharmD, is a consultant pharmacist working with long-term care facilities. High doses of magnesium glycinate may cause diarrhea, gas, or stomach pain. Very high or long-term use can lead ...