Also found in: Dictionary, Thesaurus, Acronyms, Encyclopedia, Wikipedia.


any of various trademark preparations of magnesium and aluminum salts (usually magnesium hydroxide and aluminum hydroxide) used as antacids.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

magnesium hydroxide/aluminum hydroxide

(mag-nee-zhum hye-drox-ide/ a-loo-mi-num hye-drox-ide) ,


(trade name),

Diovol Plus

(trade name),


(trade name),

Mylanta Ultimate

(trade name),


(trade name)


Therapeutic: antiulcer agents
Pharmacologic: antacids
Pregnancy Category: C


Useful in a variety of GI complaints, including:
  • Hyperacidity,
  • Indigestion,
  • GERD,
  • Heartburn.


Neutralize gastric acid following dissolution in gastric contents.
Inactivate pepsin if pH is raised to ≥4.

Therapeutic effects

Neutralization of gastric acid with healing of ulcers and decrease in associated pain.


Absorption: During routine use, antacids are nonabsorbable. With chronic use, 15–30% of magnesium and smaller amounts of aluminum may be absorbed.
Distribution: Small amounts absorbed are widely distributed, cross the placenta, and appear in breast milk. Aluminum concentrates in the CNS.
Metabolism and Excretion: Excreted by the kidneys.
Half-life: Unknown.

Time/action profile

Aluminum POslightly delayed30 min30 min-1 hr (empty stomach); 3 hr (after meals)
Magnesium POslightly delayed30 min30 min-1 hr (empty stomach); 3 hr (after meals)


Contraindicated in: Severe abdominal pain of unknown cause, especially if accompanied by fever; Renal failure (CrCl <30 mL/min); Products containing tartrazine or sugar in patients with known intolerance.
Use Cautiously in: Antacids containing magnesium in patients with any degree of renal insufficiency; ↓ bowel motility ; Dehydration; Upper GI hemorrhage; Children <12 yr (safety not established).

Adverse Reactions/Side Effects


    aluminum salts:
  • constipation (most frequent)
  • magnesium salts:
  • diarrhea (most frequent)

Fluid and Electrolyte

    magnesium salts:
  • hypermagnesemia
  • aluminum salts:
  • hypophosphatemia


Drug-Drug interaction

Absorption of tetracyclines, phenothiazines, ketoconazole, itraconazole, iron salts, fluoroquinolones, and isoniazid may be ↓ (separate by at least 2 hr).


Oral (Adults and Children ≥12 yr) 5–30 mL or 1–2 tablets 1–3 hr after meals and at bedtime.

Availability (generic available)

Chewable Tablets: 300 mg aluminum hydroxide/150 mg magnesium hydroxideOTC
Suspension: 225 mg aluminum hydroxide/200 mg magnesium hydroxide/5 mLOTC, 500 mg aluminum hydroxide/500 mg magnesium hydroxide/5 mLOTC
In combination with: simethiconeOTC. See combination drugs.

Nursing implications

Nursing assessment

  • Antacid: Assess for heartburn and indigestion as well as location, duration, character, and precipitating factors of gastric pain.
  • Lab Test Considerations: Monitor serum phosphate, potassium, and calcium levels periodically during chronic use. May cause ↑ serum calcium and ↓ serum phosphate concentrations.

Potential Nursing Diagnoses

Acute pain (Indications)


  • Magnesium and aluminum are combined as antacids to balance the constipating effects of aluminum with the laxative effects of magnesium.
  • Oral: To prevent tablets from entering small intestine in undissolved form, they must be chewed thoroughly before swallowing. Follow with at least ½ glass of water.
    • Shake suspensions well before administration.
    • For an antacid effect, administer 1–3 hr after meals and at bedtime.

Patient/Family Teaching

  • Caution patient to consult health care professional before taking antacids for more than 2 wk if problem is recurring, if relief is not obtained, or if symptoms of gastric bleeding (black, tarry stools; coffee-ground emesis) occur.
  • Advise patient not to take this medication within 2 hr of taking other medications.
  • Pediatric: Aluminum- or magnesium-containing medicines can cause serious side effects in children, especially when given to children with renal disease or dehydration. Advise parents or caregivers not to administer OTC antacids to children without consulting health care professional.

Evaluation/Desired Outcomes

  • Relief of gastric pain and irritation.
Drug Guide, © 2015 Farlex and Partners


A trademark for a preparation containing simethicone, aluminum hydroxide, and magnesium hydroxide that is used as an antacid and antiflatulent.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.


A brand name for a preparation containing ALUMINIUM HYDROXIDE and MAGNESIUM HYDROXIDE.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
References in periodicals archive ?
Because of the "potential for serious adverse events" from confusing these products, the manufacturer has agreed to change the name of Maalox Total Relief to a name that does not include the word "Maalox," to change the graphics on the product's container, and to actively monitor and report adverse events.
Aluminum-magnesium compounds (such as Maalox, Digel, Mylanta, Riopan, and Gaviscon).
Maalox,[R] Mylanta,[R] Gaviscon,[R]) and drugs that block stomach acid production (e.g.
In Kazakhstan Sanofi-Aventis is represented by Maalox and Festal with value shares of 13% and 6% in 2015.
I myself, by God's grace, was sent home with Maalox for pain and a Prev-acid tablet to be taken an hour before breakfast for two weeks.
The two main leaders of digestive remedies in 2014 were A Menarini Industrie Farmaceutiche Riunite Srl taking 16% of value share with its brands Mezym and Espumisan and the company Sanofi with a 13% value share, offering brands No-spa, Maalox and Festal.
FIX IT: For immediate relief, try an over-the-counter indigestion remedy to target bloating, such as Maalox Plus Tablets, PS4.50, Boots.
Anton added: "And if you're prone to bloating, try not to eat too quickly as this makes you swallow more air, which heightens your risk of discomfort." FIX IT: For immediate relief, try an over-the-counter indigestion remedy to target bloating, such as Maalox Plus Tablets, PS4.50, Boots.
Also be cautious about taking regular, large amounts of antacids that contain aluminum (for example, Maalox, Mylanta), since they can cause calcium loss (aluminum-free options include Rolaids and Turns).
Additionally, Rolaids, Alka-Seltzer and Maalox scored above their category averages.
MEDICATIONS LINKED TO BONE LOSS Class of drugs Examples Condition(s) they treat Aluminum-containing Gaviscon, Maalox, Mylanta Heartburn, antacids indigestion Anti-seizure medications Phenytoin (Dilantin), Seizure Phenobarbital disorder, epilepsy Aromatase inhibitors Anastrozole Breast cancer (Arimidex),exemestane (Aromasin), letrozole (Femara) Immunosuppressants Cyclosporine A and Organ transplant tacrolimus (FK506) Glucocorticoids Cortisone, Prednisone Rheumatoid arthritis, asthma Proton pump inhibitors Nexium, Prilosec, Gastroesophageal (PPIs) Prevacid reflux disease.
Some of the biggest laughs came from the number "My Favorite Things." Instead of "raindrops on roses," as in the original Rodgers and Hammerstein version, the ladies sang about Maalox and dentures.