Magnesium hydroxide — Uses, Dosage, Side Effects & Safety

Drug class: Antacid, Osmotic Laxative

Overview

Magnesium hydroxide is a medication commonly used to relieve occasional constipation and to neutralize excess stomach acid. It is often known by the brand name 'Milk of Magnesia.' As an antacid, it helps reduce symptoms of heartburn, indigestion, and upset stomach by neutralizing gastric acid. As a laxative, it works by drawing water into the intestines, which softens stool and promotes bowel movements. This medicine is available over-the-counter in various forms, including chewable tablets and oral suspensions. It typically works within 30 minutes to 6 hours for constipation relief. Patients should use magnesium hydroxide only as directed and avoid prolonged or excessive use, as this can lead to electrolyte imbalances or other complications. Key points: Always follow dosing instructions, drink plenty of fluids, and consult your healthcare provider if you have kidney problems, are pregnant, or are taking other medications.

Therapeutic uses

• Constipation
• Indigestion
• Heartburn
• Sour stomach

Common side effects

• Diarrhea
• Abdominal cramps
• Nausea
• Vomiting
• Dehydration
• Electrolyte imbalance
• Muscle weakness

Frequently Asked Questions about Magnesium hydroxide

How quickly does magnesium hydroxide work for constipation?

Magnesium hydroxide typically produces a bowel movement within 30 minutes to 6 hours after oral administration.

Can I use magnesium hydroxide daily?

It is not recommended for daily or prolonged use without medical supervision, as it may cause electrolyte imbalances or dependence.

Is magnesium hydroxide safe during pregnancy?

Magnesium hydroxide may be used during pregnancy if clearly needed and prescribed by a healthcare provider. Always consult your doctor before use.

Can children take magnesium hydroxide?

Yes, but dosing is age-dependent and should be used with caution. Children under 6 years should only use it under medical advice.

What should I do if I experience diarrhea after taking magnesium hydroxide?

Mild diarrhea is common, but if it is severe or persistent, stop taking the medication and consult your healthcare provider.

Can I take magnesium hydroxide with other antacids or laxatives?

Avoid using multiple antacids or laxatives simultaneously unless directed by your doctor, as this may increase the risk of side effects.

What are the signs of a serious reaction to magnesium hydroxide?

Serious reactions include muscle weakness, irregular heartbeat, severe diarrhea, confusion, or allergic reactions such as swelling or difficulty breathing. Seek immediate medical attention if these occur.

Educational information only. Always consult a qualified healthcare professional before starting, stopping, or changing any medication.