Aluminum Hydroxide; Magnesium Carbonate Chewable Tablets

What is this medication?

ALUMINUM HYDROXIDE; MAGNESIUM CARBONATE (a LOO mi num hye DROX ide; mag NEE zee um KAR bon ate) treats occasional heartburn, indigestion, upset stomach, or other conditions caused by too much stomach acid. It works by reducing the amount of acid in the stomach. It belongs to a group of medications called antacids.

This medicine may be used for other purposes; ask your health care provider or pharmacist if you have questions.

COMMON BRAND NAME(S): Acid Gone, Foaming Antacid, Gaviscon, Gaviscon Extra Strength

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What should I tell my care team before I take this medication?

They need to know if you have any of these conditions:

  • Bowel, intestinal, or stomach disease
  • Constipation
  • Diarrhea
  • Kidney disease
  • Liver disease
  • On a sodium (salt) restricted diet
  • Stomach bleeding or obstruction
  • An unusual or allergic reaction to aluminum hydroxide, magnesium carbonate or other antacids, foods, dyes, or preservatives
  • Pregnant or trying to get pregnant
  • Breast-feeding

How should I use this medication?

Take this medication by mouth. Follow the directions on the label. Chew the tablets well so that foam forms in your mouth before swallowing. Do not suck on or crush the tablets. The protective foam will not form if you do this. After taking this medication, drink a full glass of water. Antacids are usually taken after meals and at bedtime, or as directed by your care team. You should remain in an upright position for 1 to 2 hours after taking this medication. Take your medication at regular intervals. Do not take your medication more often than directed.

Talk to your care team about the use of this medication in children. While this medication may be used in children for selected conditions, precautions do apply.

Overdosage: If you think you have taken too much of this medicine contact a poison control center or emergency room at once.

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NOTE: This medicine is only for you. Do not share this medicine with others.

What if I miss a dose?

If you miss a dose, take it as soon as you can. If it is almost time for your next dose, take only that dose. Do not take double or extra doses.

What may interact with this medication?

  • Antibiotics
  • Delavirdine
  • Gabapentin
  • Isoniazid
  • Medications for fungal infections, such as itraconazole and ketoconazole
  • Medications for osteoporosis, such as alendronate, etidronate, risedronate and tiludronate
  • Medications for seizures, such as ethotoin and phenytoin
  • Methenamine
  • Phenothiazines, such as chlorpromazine, mesoridazine, prochlorperazine, thioridazine
  • Quinidine
  • Rosuvastatin
  • Sotalol
  • Tacrolimus
  • Thyroid hormones, such as levothyroxine
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  • Vitamin D

This list may not describe all possible interactions. Give your health care provider a list of all the medicines, herbs, non-prescription drugs, or dietary supplements you use. Also tell them if you smoke, drink alcohol, or use illegal drugs. Some items may interact with your medicine.

What should I watch for while using this medication?

Tell your care team if your symptoms do not start to get better or if they get worse. Do not treat yourself for stomach problems with this medication for more than 2 weeks. See your care team if you have black tarry stools, rectal bleeding, or if you feel unusually tired. Do not change to another antacid product without advice.

If you are taking other medications, leave an interval of at least 2 hours before or after taking this medication.

To help reduce constipation, drink several glasses of water a day.

What side effects may I notice from receiving this medication?

Side effects that you should report to your care team as soon as possible:

  • Allergic reactions—skin rash, itching, hives, swelling of the face, lips, tongue, or throat
  • High magnesium level—confusion, drowsiness, facial flushing, redness, sweating, muscle weakness, fast or irregular heartbeat, trouble breathing

Side effects that usually do not require medical attention (report to your care team if they continue or are bothersome):

  • Constipation
  • Diarrhea

This list may not describe all possible side effects. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Where should I keep my medication?

Keep out of the reach of children and pets.

Store at room temperature between 15 and 30 degrees C (59 and 86 degrees F). Protect from light and moisture. Throw away any unused medication after the expiration date.

NOTE: This sheet is a summary. It may not cover all possible information. If you have questions about this medicine, talk to your doctor, pharmacist, or health care provider.

Copyright ©2023 Elsevier Inc. All Rights Reserved.

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Note: Introduction and Frequently Asked Questions written and medically approved by Cleveland Clinic professionals.

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