Before you begin using a medication, be sure to inform your doctor of any medical conditions or Allergies you may have, any medications you are taking, whether you are pregnant or breast-feeding, and any other significant facts about your health. These factors may affect how you should use Phillips Magnesia.

Digestive tract symptoms: Fever, nausea, vomiting, abdominal pain, or bloating could be symptoms of Appendicitis. Speak with your doctor before taking magnesium hydroxide if you have any of these symptoms.

If you have an ileostomy or colostomy, it is recommended that you avoid magnesium hydroxide and other laxatives.

Heart disease: Magnesium can cause a condition called heart block, a slowing down of the heart rate. Due to this side effect, magnesium hydroxide is generally not recommended for people with heart block.

Kidney function: If you have decreased function or Kidney Disease, discuss with your doctor how Phillips Magnesia may affect your medical condition, how your medical condition may affect the dosing and effectiveness of Phillips Magnesia, and whether any special monitoring is needed.

Long-term use: Phillips Magnesia should not be taken daily for more than one week. Long-term use can make your bowels dependent on Phillips Magnesia to function. If you experience constipation for more than one week, contact your doctor.

Myasthenia Gravis: Myasthenia gravis is a condition that causes specific muscle weakness. Magnesium hydroxide may cause the symptoms of myasthenia gravis to get worse. If you have myasthenia gravis, discuss with your doctor how Phillips Magnesia may affect your medical condition, how your medical condition may affect the dosing and effectiveness of Phillips Magnesia, and whether any special monitoring is needed.

Rectal bleeding or lack of bowel movement: If you experience rectal bleeding or do not have a bowel movement after using Phillips Magnesia, contact your doctor. These symptoms may mean you have a more serious condition.

Sudden change in bowel habits: If you've noticed a sudden, persistent change in your bowel habits over the last 2 weeks, talk to your doctor before taking Phillips Magnesia.

Pregnancy: Occasional use of magnesium hydroxide is considered safe during pregnancy. If you have concerns, talk your doctor about whether you should continue to take magnesium hydroxide.

Breast feeding: Occasional use of magnesium hydroxide is considered safe while breast feeding. If you are a breast-feeding mother and have concerns, talk to your doctor about whether you should continue breast feeding.