About magnesium oxide + magnesium hydroxide
Magnesium supplement and antacid
Used for
- Treating or preventing magnesium deficiency
- Relieving occasional heartburn and indigestion
- Short-term relief of constipation
Usual adult dose
Doses vary by indication and formulation; follow the product label. Magnesium oxide commonly provides 200–400 mg elemental magnesium daily.
Common side effects
- Diarrhea or loose stools
- Nausea or abdominal cramps
Important warnings
- Kidney impairment can cause dangerous magnesium buildup.
- Excess use may cause severe diarrhea or high blood magnesium.
- Controlled-release tablets should be swallowed whole.
- Seek medical assessment for persistent heartburn or constipation.
Pregnancy
Magnesium is generally used when needed during pregnancy; evidence for this specific combination is limited.
Breastfeeding
Magnesium is generally compatible with breastfeeding at usual doses; evidence for this specific combination is limited.
Interactions
- Can reduce absorption of tetracycline and quinolone antibiotics; separate doses.
- Can reduce absorption of levothyroxine and oral bisphosphonates; separate doses.
- May affect absorption of iron supplements; 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 It may be incomplete or out of date.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.