Milk of Magnesia

Generic name

Magnesium hydroxide

How Is It Administered?

Milk of Magnesia comes as a tablet or liquid to take by mouth.

What Is It Used For?

Milk of Magnesia is used on a short-term basis to treat constipation.

What Should I Tell My Doctor Before I Begin Taking It?

Tell your doctor:

  • if you are allergic to magnesium hydroxide or any other drugs
  • what prescription and nonprescription medications you are taking, including vitamins
  • if you have or have ever had kidney disease

When To Call Your Doctor

Although side effects from Milk of Magnesia are not common, they can occur. If you experience any of the following symptoms, call your doctor:

  • stomach cramps
  • upset stomach
  • vomiting
  • diarrhea