<unk>  is a laxative that is FDA approved for the treatment of constipation, magnesium deficiency.   Common adverse reactions include diarrhea, asthenia, dizziness, hypermagnesemia.
Magnesium citrate
Calcium citrate
Potassium citrate
Magnesium sulfate 
Potassium perchlorate
Magnesium carbonate
Magnesium lactate
Potassium salicylate