Aluminium hydroxide: a practical guide for everyday antacid use
Did you know many over-the-counter antacids rely on aluminium hydroxide to calm heartburn fast? If you get occasional acid reflux, this ingredient is common and effective. This page tells you how it works, when to use it, what to watch for, and simple tips to use it safely with other medicines.
How it works and when to use
Aluminium hydroxide is an antacid that neutralizes stomach acid on contact. You'll find it in chewable tablets, liquids, or combined with other ingredients like magnesium hydroxide. People use it for short-term relief of heartburn, sour stomach, and acid-related discomfort.
OTC products usually give clear dosing on the package. A typical chewable dose is one or two tablets after meals or at bedtime. If you need relief more than twice a week, talk to your doctor — frequent symptoms may mean a different treatment is better.
Side effects, interactions, and safety tips
The most common side effect is constipation. That happens because aluminium binds phosphate in the gut. Long-term or high-dose use can lower phosphate levels, which matters if you take it every day for months. If you have kidney disease, avoid regular use unless a doctor says it’s OK — your kidneys clear aluminium from the body.
Drug interactions are important. Aluminium can bind several medicines and make them less effective. Watch especially for:
- Tetracycline and fluoroquinolone antibiotics (they may not work as well).
- Levothyroxine (thyroid medicine).
- Iron supplements and bisphosphonates (bone drugs).
A practical rule: separate aluminium hydroxide and these medicines by about two hours. Read your medicine labels and ask your pharmacist if you’re unsure.
If you’re pregnant or breastfeeding, check with your healthcare provider before using any antacid regularly. For short, occasional use most people tolerate aluminium-containing antacids fine, but persistent symptoms should be evaluated.
Quick tips to use it smartly:
- Follow the package directions; don’t exceed the daily limit printed on the label.
- If you feel constipated, try an antacid with magnesium instead, or talk to your pharmacist.
- Don’t rely on antacids for ongoing reflux — see your doctor if symptoms last more than two weeks.
- Tell your provider about all prescriptions and supplements so they can check for interactions.
If you want alternatives, calcium carbonate and magnesium-based antacids work differently and may suit some people better. Still unsure which is best for you? A short call to your pharmacist or doctor will save time and avoid problems.
Want more detailed articles or product reviews related to antacids and heartburn care? Browse our guides and medication pages to compare options and find safe, practical advice that fits your situation.
