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Aluminium Hydroxide

Also indexed as: Algedrate, Alternagel, Alu-Cap, Alu-Tab, Aludrox, Aludrox Liquid, Alugel, Amphojel, Di-Gel, Metapharma Aluminium Hydroxide Gel, Riopan

Illustration

Aluminium hydroxide acts as an antacid and is most commonly used in the treatment of heartburn, gastritis, and peptic ulcer. This drug is also sometimes used to reduce absorption of phosphorus for people with kidney failure.

Aluminium hydroxide is found in a variety of antacids. People should read the ingredient label for over-the-counter (OTC) drugs carefully before purchase to know exactly what they contain.

Summary of Interactions with Vitamins, Herbs, and Foods
In some cases, a herb or supplement may appear in more than one category, which may seem contradictory. For clarification, read the full article for details about the summarized interactions.

Beneficial May Be Beneficial: Depletion or interference—The medication may deplete or interfere with the absorption or function of the nutrient. Taking these nutrients may help replenish them.

Calcium

Folic acid

Phosphorus
Beneficial May Be Beneficial: Supportive interaction—Taking these supplements may support or otherwise help your medication work better.

Alginates
Avoid Avoid: Adverse interaction—Avoid these supplements when taking this medication because taking them together may cause undesirable or dangerous results.

Citrate
Side effect reduction/prevention

None known
Reduced drug absorption/bioavailability

None known

An asterisk (*) next to an item in the summary indicates that the interaction is supported only by weak, fragmentary, and/or contradictory scientific evidence.

Interactions with Dietary Supplements

Alginates
A thick gel derived from algae has been used together with aluminium antacids to treat heartburn. Together, alginate gel and antacid were more effective at relieving symptoms1 and improving healing.2 Alginate is believed to work by physically blocking stomach acid from touching the oesophagus. According to these studies, two tablets containing 200 mg alginic acid should be chewed before each meal and at bedtime.

Calcium
Aluminium hydroxide may increase urinary and stool loss of calcium.3 Also, aluminium is a toxic mineral, and a limited amount of aluminium absorption from aluminium-containing antacids does occur.4 As a result, most doctors do not recommend routine use of aluminium-containing antacids.5 Other types of antacids containing calcium or magnesium instead of aluminium are available.

Citrate
A few studies have shown that combination of citrate, either as calcium citrate supplements or from orange and lemon juice, with aluminium-containing antacids increases aluminium levels in the body.6 7 8 Calcium in forms other than calcium citrate has been shown to not increase aluminium absorption.9 Drinking 7–10 ounces of orange juice provides sufficient citrate to be problematic.10 11 Intake of 950 mg calcium citrate greatly elevates aluminium absorption.12 People with renal failure may be at particular risk of kidney damage due to elevated aluminium levels if they combine aluminium hydroxide with citrate.13

Folic acid
Folic acid is needed by the body to utilise vitamin B12. Antacids,14 including aluminium hydroxide, inhibit folic acid absorption. People taking antacids are advised to supplement with folic acid.

Phosphorus
Depletion of phosphorus may occur as a result of taking aluminium hydroxide. For those with kidney failure, reducing phosphorus absorption is the purpose of taking the drug, as excessive phosphorus levels can result from kidney failure. However, when people with normal kidney function take aluminium hydroxide for extended periods of time, it is possible to deplete phosphorus to unnaturally low levels.

References

1. McHardy G. A multicentric, randomized clinical trial of Gaviscon in reflux esophagitis. South Med J 1978;71(suppl 1):16–21.

2. Graham DY, Lanza F, Dorsch ER. Symptomatic reflux esophagitis: A double-blind controlled comparison of antacids and alginate. Curr Ther Res 1977;22:653–8.

3. Spencer H, Kramer L. Antacid-induced calcium loss. Arch Intern Med 1983;143:657–8 [editorial].

4. Anonymous. Is aluminum harmless? Nutr Rev 1980;38:242–3 [review].

5. Gaby AR. Aluminum: The ubiquitous poison. Nutr Healing 1997;4:3,4,11.

6. Walker JA, Sherman RA, Cody RP. The effect of oral bases on enteral aluminum absorption. Arch Intern Med 1990;150:2037–9.

7. Weberg R, Berstad A. Gastrointestinal absorption of aluminum from single doses of aluminum containing antacids in man. Eur J Clin Invest 1986;16:428–32.

8. Fairweather-Tait S, Hickson K, McGaw B, Redi M. Orange juice enhances aluminum absorption from antacid preparation. Eur J Clin Nutr 1994;48:71–3.

9. Nolan CR, Califano JR, Butzin CA. Influence of calcium acetate or calcium citrate on intestinal aluminum absorption. Kidney Int 1990;38:937–41.

10. Anonymous. Preliminary findings suggest calcium citrate supplements may raise aluminum levels in blood, urine. Family Practice News 1992;22:74–5.

11. Fairweather-Tait S, Hickson K, McGaw B, Redi M. Orange juice enhances aluminum absorption from antacid preparation. Eur J Clin Nutr 1994;48:71–3.

12. Nolan CR, Califano JR, Butzin CA. Influence of calcium acetate or calcium citrate on intestinal aluminum absorption. Kidney Int 1990;38:937–41.

13. Walker JA, Sherman RA, Cody RP. The effect of oral bases on enteral aluminum absorption. Arch Intern Med 1990;150:2037–9.

14. Russell RM, Golner BB, Krasinski SD, et al. Effect of antacid and H2 receptor antagonists on the intestinal absorption of folic acid. J Lab Clin Med 1988;112:458–63.