Calcium Carbonate / Famotidine / Magnesium Hydroxide Side Effects

Medically reviewed by Drugs.com. Last updated on Mar 17, 2024.

Applies to calcium carbonate / famotidine / magnesium hydroxide: oral tablet chewable.

Important warnings This medicine can cause some serious health issues

You should not use this medicine if you are allergic to famotidine or similar stomach acid reducers, such as ranitidine, cimetidine, Zantac, or Tagamet).

Do not use this medicine if you have trouble swallowing food, if you are vomiting blood, or if you have bloody or tarry stools.

Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Stop using calcium carbonate, famotidine, and magnesium hydroxide and call your doctor at once if:

• your heartburn gets worse; or

• you still have heartburn after 2 weeks of taking calcium carbonate, famotidine, and magnesium hydroxide.

Less serious side effects may be more likely, and you may have none at all.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects.

For healthcare professionals

Applies to calcium carbonate / famotidine / magnesium hydroxide: oral tablet chewable.

Gastrointestinal adverse events

• Uncommon (0.1% to 1%): Abdominal discomfort, abdominal pain, diarrhea, dry mouth, flatulence, nausea, vomiting
• Rare (less than 0.1%): Abdominal pain upper, constipation
• Frequency not reported: Abdominal distension, abnormal feces, dyspepsia, eructation^[Ref]

Nervous system

• Uncommon (0.1% to 1%): Dizziness, dysgeusia
• Rare (less than 0.1%): Somnolence
• Frequency not reported: Paresthesia^[Ref]

Other

• Uncommon (0.1% to 1%): Asthenia, fatigue
• Rare (less than 0.1%): Malaise^[Ref]

Respiratory

• Uncommon (0.1% to 1%): Oropharyngeal discomfort, oropharyngeal pain^[Ref]

Dermatologic

• Uncommon (0.1% to 1%): Rash
• Rare (0.01% to 0.1%): Pruritus, urticaria
• Very rare (less than 0.01%): Alopecia^[Ref]

Hypersensitivity

• Rare (less than 0.1%): Anaphylactic reaction, angioedema, hypersensitivity^[Ref]

Hepatic

• Rare (less than 0.1%): Cholestatic jaundice, hepatic enzyme abnormal, liver disorder^[Ref]

Hematologic

• Rare (less than 0.1%): Leukopenia, pancytopenia^[Ref]

Metabolic

• Rare (less than 0.1%): Decreased appetite
• Frequency not reported: Thirst^[Ref]

Musculoskeletal

• Rare (less than 0.1%): Arthralgia^[Ref]

Psychiatric

• Frequency not reported: Nervousness^[Ref]

Endocrine

• Rare (less than 0.1%): Gynecomastia^[Ref]

Further information

Calcium carbonate/famotidine/magnesium hydroxide side effects can vary depending on the individual. Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Note: Medication side effects may be underreported. If you are experiencing side effects that are not listed, submit a report to the FDA by following this guide.

Medical Disclaimer