About magnesium hydroxide
Osmotic laxative and antacid
Used for
- Short-term relief of occasional constipation
- Relief of heartburn, indigestion, and acid stomach
Usual adult dose
Constipation: 30–60 mL once daily. Antacid: 5–15 mL as needed, up to four times daily.
Usual dose in children
Constipation: ages 6–11, 15–30 mL once daily; under 6, use only with medical guidance. Not for routine antacid use in children.
Common side effects
- Diarrhea
- Abdominal cramps
- Nausea
- High magnesium levels, especially with kidney problems
Important warnings
- Avoid or seek medical guidance with kidney disease.
- Do not use for constipation longer than one week without medical guidance.
- Separate from other oral medicines by at least two hours.
- Seek care for severe abdominal pain, vomiting, or persistent bowel changes.
Pregnancy
Occasional use is generally considered low risk, but prolonged or excessive use should be avoided.
Breastfeeding
Usually compatible with breastfeeding when used as directed; prolonged or excessive use should be avoided.
Interactions
- May reduce absorption of tetracycline and quinolone antibiotics.
- May reduce absorption of bisphosphonates, iron, and thyroid medicines.
- Magnesium-containing antacids can affect absorption of several other medicines; separate doses.
AI-generated from general medical knowledge, not from this product's official leaflet. It may be incomplete or out of date. Not medical advice — ask a pharmacist or doctor before making any decision.