Magnesium Hydroxide (Milk of Magnesia)

Question 1

Magnesium Hydroxide (Milk of Magnesia): Class?

Answer 1

• Antacid
• Laxative

Question 2

Why is Magnesium Hydroxide (Milk of Magnesia) given pre-operatively?

Answer 2

To help protect the stomach from stress ulcers

Question 3

How does Magnesium Hydroxide (Milk of Magnesia) act as a laxative?

Answer 3

• Acts on the small intestine and colon.
• The osmotic action retains water, thereby softening feces; fecal swelling then promotes peristalsis
• Produces soft stool in 6-12 hours (low-dose)
• Produces soft stool in 2-6 hours (high-dose)

Question 4

Magnesium Hydroxide (Milk of Magnesia) is given in high doses to…

Answer 4

Empty the bowel in preparation for diagnostic and surgical procedures

Question 5

True or False

The patient should decrease their fluid intake when taking Magnesium Hydroxide (Milk of Magnesia).

Answer 5

False, they should be told to INCREASE

Question 6

True or False

Magnesium Hydroxide (Milk of Magnesia) is acceptable to used for a patient with undiagnosed abdominal pain.

Answer 6

False, it should be AVOIDED

Question 7

To compensate for diarrhea caused by Magnesium Hydroxide (Milk of Magnesia), ____ is administered. Why?

Answer 7

• Aluminum hydroxide (Amphojel)
• Because it is an antacid that PROMOTES constipation

Question 8

Why is Magnesium Hydroxide (Milk of Magnesia) contraindicated for patients with renal impairment?

Answer 8

Magnesium levels can become toxic

Question 9

Why is short-term use of Magnesium Hydroxide (Milk of Magnesia) recommended?

Answer 9

Long-term use can lead to laxative dependence

Question 10

Hypermagnesemia can lead to what conditions?

Answer 10

• CNS depression
• Hypotension
• Muscle weakness
• Paralysis
• Death

Question 11

Magnesium Hydroxide (Milk of Magnesia): SFX?

Answer 11

• Dehydration
• CNS Depression
• Hypocalcemia
• GI Disturbances