milk of magnesia, a laxative and antacid containing magnesium hydroxide. 
INDICATIONS: It is prescribed to relieve constipation and, less commonly, acid indigestion. CONTRAINDICATIONS: Renal impairment, symptoms of appendicitis, or known hypersensitivity to the drug prohibits its use. ADVERSE EFFECTS: Among the most serious adverse effects are diarrhea and hypermagnesemia, which usually occur in patients who have impaired renal function.
