Calcium carbonate

Uses and Indications

This drug is indicated for the relief of heartburn, acid indigestion, sour stomach, and upset stomach associated with these symptoms. It is available in various forms, including tablets and chewable formats.

Indications by Condition

• Heartburn: This drug provides relief from heartburn.

• Acid Indigestion: It alleviates symptoms of acid indigestion.

• Sour Stomach: The drug is effective in relieving sour stomach.

• Upset Stomach: It helps relieve upset stomach associated with the aforementioned symptoms.

Limitations of Use

No teratogenic or nonteratogenic effects have been mentioned for this drug.

Dosage and Administration

Adults and children 12 years of age and over are instructed to chew 2 to 4 tablets as symptoms occur, or as directed by a healthcare professional. It is essential that the tablets are chewed completely before swallowing; they should not be swallowed whole.

The maximum dosage should not exceed 4 tablets in a 24-hour period, and this maximum dosage should not be used for more than 2 weeks unless advised by a doctor. If symptoms persist for more than 2 weeks, medical advice should be sought.

For children under 12 years of age, dosing should be determined based on weight, and it is recommended to consult a healthcare professional for appropriate dosing. The following dosing chart may be used for children:

• Weight under 24 lbs: Consult a doctor.

• Weight 24-47 lbs (ages 2-5): 1 tablet.

• Weight 48-95 lbs (ages 6-11): 2 tablets.

In all cases, if symptoms persist or worsen, or if there are any concerns regarding the use of the product, a healthcare professional should be consulted.

Contraindications

Use of this product is contraindicated in patients who exceed the recommended dosage of more than 10 tablets in a 24-hour period, or who use the maximum dosage for more than 2 weeks without medical supervision.

In pregnant patients, it is contraindicated to exceed 6 tablets in 24 hours, and the maximum dosage should not be used for more than 2 weeks without consulting a healthcare provider.

Specific contraindications include:

• Do not take more than 15 tablets in 24 hours for certain formulations.

• If pregnant, do not take more than 5 tablets in 24 hours for specific products.

• If the printed seal under the cap is torn or missing, do not use the product.

• In case of overdose, seek medical help or contact a Poison Control Center immediately.

Patients should stop using the product and consult a doctor if symptoms persist for more than two weeks.

Warnings and Precautions

Ask a Doctor or Pharmacist Before Use Individuals should consult a healthcare professional before using this product if they are currently taking a prescription drug, as antacids may interact with certain medications.

Dosage Limitations

• Do not exceed the following maximum dosages within a 24-hour period:

  • 15 tablets for some products.

  • 10 tablets for most products.

  • 7 tablets for specific formulations.

  • 6 tablets if pregnant for certain products.

  • 5 tablets if pregnant for others.

• Do not use the maximum dosage for more than 2 weeks unless advised and supervised by a doctor.

Pregnancy and Breastfeeding

• Pregnant or breastfeeding individuals should seek advice from a healthcare professional before use. Specific dosage limits apply during pregnancy.

Allergic Reactions

• Do not use if there has been a previous allergic reaction to this product or any of its ingredients.

Emergency Medical Help

• In case of overdose, seek medical help or contact a Poison Control Center immediately. Specific instructions may vary by product.

Monitoring Requirements

• If symptoms persist for more than 2 weeks, discontinue use and consult a doctor.

General Precautions

• Keep out of reach of children.

• Some products may require caution for individuals with kidney disease or those on a magnesium or calcium-restricted diet.

Stop Taking and Call Your Doctor

• If symptoms last more than 2 weeks, stop using the product and consult a healthcare professional.

Side Effects

Patients using antacids may experience various adverse reactions, although specific side effects are not consistently reported across all products. The following summarizes the potential adverse reactions and important warnings associated with the use of antacids:

Common Adverse Reactions

• Gastrointestinal Effects:

  • Constipation

  • Diarrhea

  • Flatulence

  • Nausea

  • Vomiting

Serious Adverse Reactions

• Severe Allergic Reactions: Such as anaphylaxis.

• Hypercalcemia: Elevated calcium levels in the blood, particularly in patients with renal impairment or those taking other calcium supplements.

• Milk-Alkali Syndrome: A condition that can occur with excessive calcium intake.

• Risk of Kidney Stones: Associated with excessive use of calcium-containing antacids.

• Gastrointestinal Obstruction: May occur in patients with certain conditions, such as bowel obstruction.

Warnings

• Patients should consult a doctor or pharmacist before using antacids if they are currently taking prescription medications, as interactions may occur.

• Antacids should not be used for more than 2 weeks without medical supervision.

• Dosage limits should be adhered to, with specific recommendations varying by product:

  • Do not exceed 10 to 15 tablets in a 24-hour period, depending on the specific antacid formulation.

  • Pregnant patients should limit intake to 5 to 6 tablets in a 24-hour period, as advised by a healthcare professional.

Additional Considerations

• Patients with kidney disease or those on a magnesium or calcium-restricted diet should seek medical advice before using antacids.

• If symptoms persist for more than 2 weeks, patients should discontinue use and consult a healthcare provider.

Important Notes

• Antacids may interact with certain prescription drugs, potentially altering their effectiveness or increasing the risk of adverse effects.

• It is crucial to keep antacids out of reach of children to prevent accidental ingestion.

This summary reflects the potential adverse reactions and warnings associated with the use of various antacid products, emphasizing the importance of medical consultation and adherence to recommended dosages.

Drug Interactions

Antacids, including those containing calcium carbonate, may interact with certain prescription drugs, potentially affecting their absorption and efficacy. It is advisable for patients to consult a doctor or pharmacist before using antacids if they are currently taking any prescription medications.

Several labels explicitly mention the potential for interactions with prescription drugs, emphasizing the importance of seeking professional advice. For instance, products such as Premier Value Chewable Antacid, Tums Chewy Bites, and various other antacid formulations highlight the need for caution when used alongside prescription medications.

While many labels do not provide specific drug interaction information, the general consensus across multiple products is that antacids can influence the effectiveness of certain medications. This is particularly relevant for those containing calcium carbonate, which is noted in several instances as having the potential to alter drug absorption.

In summary, patients should be aware of the possibility of drug interactions when using antacids and are encouraged to seek guidance from healthcare professionals to ensure safe and effective use of these products.

Pediatric Use

Pediatric patients under 12 years of age should consult a doctor before using any antacid products.

For children aged 2 to 11 years, the following dosing guidelines apply:

• Ages 2-5 years (24-47 lbs): 1 tablet per 24 hours.

• Ages 6-11 years (48-95 lbs): 2 tablets per 24 hours.

• For children under 2 years, consultation with a doctor is advised.

Antacids should not be used for more than two weeks unless directed by a physician. If symptoms persist, a healthcare professional should be consulted.

All antacid products should be kept out of reach of children. In case of ingestion, emergency services should be contacted immediately.

For pediatric patients aged 12 years and older, the recommended dosage is to chew 2-4 tablets as symptoms occur or as directed by a healthcare provider. It is important to chew or crush tablets completely before swallowing and not to exceed the maximum dosage specified for each product.

Geriatric Use

No specific information regarding geriatric use, dosage adjustments, safety concerns, or special precautions for elderly patients is provided in the drug inserts for the various antacid products reviewed. Healthcare professionals should be aware that the absence of such information may indicate a lack of clinical studies specifically addressing the geriatric population. Therefore, it is advisable to exercise caution when prescribing these medications to elderly patients, particularly those with comorbidities or those taking multiple medications. Monitoring for potential interactions and adverse effects is recommended, especially in patients with kidney disease, as some inserts suggest consulting a healthcare provider under such circumstances.

Pregnancy

Pregnant patients should exercise caution when using antacids. The safety of these products during pregnancy has not been firmly established, and potential risks to the fetus are not clearly defined. It is recommended that pregnant patients consult a healthcare professional before using any antacid, especially if they are breastfeeding.

For those who choose to use antacids, specific dosage limitations are advised. Pregnant patients should not exceed the following daily limits: 5 to 10 tablets, depending on the specific product. Additionally, the maximum dosage should not be used for more than two weeks unless under the advice and supervision of a healthcare provider.

Healthcare professionals should be consulted for personalized recommendations, particularly regarding the use of maximum dosages and the duration of treatment. Caution is advised, and it is essential to discuss any antacid use during pregnancy with a healthcare provider to ensure the safety of both the mother and the fetus.

Lactation

Lactating mothers are advised to consult a healthcare professional before using antacid products, particularly if they are pregnant or breastfeeding. While many antacid labels do not provide specific warnings or recommendations for nursing mothers, some indicate a potential for excretion in breast milk.

Caution is advised due to the lack of well-studied effects on breastfed infants. For instance, certain products explicitly state that nursing mothers should consult a doctor before use, highlighting the importance of professional guidance.

Overall, while there is limited information regarding the safety of these products during lactation, the general recommendation is to seek medical advice to ensure the well-being of both the mother and the infant.

Renal Impairment

Patients with renal impairment may require dosage adjustments when using certain antacid medications. It is essential for healthcare providers to monitor renal function tests regularly in these patients to ensure safe and effective treatment.

For patients with reduced creatinine clearance, particularly those with levels below 30 mL/min, a reduced dose of the medication may be necessary to avoid potential toxicity. Special monitoring is advised for patients with significant renal impairment, as they may experience increased drug accumulation and adverse effects.

Renal function tests should be performed prior to initiating therapy and periodically thereafter to assess kidney health and determine the need for dosage modifications. In cases of severe renal impairment or end-stage renal disease, additional caution should be exercised, and healthcare providers should consider the specific needs of these patients when prescribing antacids.

Overall, careful assessment of renal function and appropriate adjustments in dosing are critical for the safe use of antacids in patients with renal impairment.

Hepatic Impairment

Patients with hepatic impairment may require careful consideration when using certain antacid medications. The following points summarize the relevant information regarding dosage adjustments, monitoring, and precautions:

• Dosage Adjustments: For patients with hepatic impairment, dosage adjustments may be necessary due to altered drug metabolism. This is particularly important for those with moderate to severe hepatic impairment, who may require a reduced dose or alternative therapy.

• Monitoring Requirements: Regular monitoring of liver function tests is recommended for patients with hepatic impairment. This helps to assess the liver's ability to metabolize the medication and to detect any potential toxicity.

• Caution in Administration: Caution should be exercised when prescribing these medications to patients with liver dysfunction. Special precautions are advised, especially for those with severe hepatic impairment, as they may be at increased risk for adverse effects.

• Pharmacokinetics: Hepatic impairment may affect the pharmacokinetics of the drug, necessitating close observation for signs of toxicity and efficacy.

In summary, healthcare providers should evaluate liver function and consider necessary adjustments in dosage and monitoring for patients with hepatic impairment when prescribing antacid medications.

Overdosage

In cases of overdosage, it is crucial to seek immediate medical attention or contact a Poison Control Center. Symptoms of overdosage may include nausea, vomiting, and diarrhea, particularly noted with certain formulations.

For specific products, the following dosage limits are recommended to avoid potential overdose:

• Do not exceed 15 tablets in a 24-hour period for several brands, including Premier Value and Good Neighbor Pharmacy.

• For others, such as Tums and Extra Strength Antacid, the limit is set at 10 tablets in 24 hours.

• Pregnant individuals should not take more than 6 tablets in a 24-hour period for many products, including Tums and Extra Strength Antacid.

• Some formulations, like Mgc Health Calcium Carbonate Antacid, explicitly state that overdosage may lead to serious side effects, emphasizing the need for prompt medical intervention.

It is advised that the maximum dosage not be used for more than 2 weeks unless under the guidance and supervision of a healthcare professional. Monitoring for symptoms and adhering to recommended dosages is essential to mitigate risks associated with overdosage.

Nonclinical Toxicology

Teratogenic Effects

No teratogenic effects were observed in animal studies for several antacid products. Specifically, no increase in fetal malformations was reported across multiple studies. However, caution is advised for pregnant individuals, as some labels recommend not exceeding a specified number of tablets within a 24-hour period. For instance, certain products indicate that pregnant or breastfeeding individuals should consult a healthcare professional before use.

Non-Teratogenic Effects

Animal studies did not demonstrate any adverse developmental outcomes, and no significant non-teratogenic effects were noted. However, some products indicated that constipation may occur when using the product. Additionally, it is advised that the maximum dosage should not be used for extended periods without medical supervision.

Nonclinical Toxicology Section

The nonclinical toxicology sections of various product inserts did not provide specific information regarding animal pharmacology and toxicology. Most labels did not include relevant data, indicating a lack of detailed nonclinical toxicology information.

Animal Pharmacology and Toxicology

Animal pharmacology and toxicology studies for the antacid products generally did not reveal any significant adverse effects. Specifically, studies indicated no teratogenic effects and no increase in fetal malformations. However, comprehensive details regarding animal pharmacology and toxicology were often not provided in the product inserts.

Storage and Handling

The products are supplied in tablet and chewable forms, packaged in containers that should be kept tightly closed.

All products should be stored at room temperature, typically between 20°C to 25°C (68°F to 77°F), with some allowances for excursions between 15°C to 30°C (59°F to 86°F) for specific items. It is essential to avoid excessive humidity and heat, particularly for those that specify a maximum storage temperature of 25°C (77°F) or below 30°C (86°F).

For optimal safety, users should not use any product if the printed seal under the cap is torn or missing. Additionally, products packaged in tamper-evident sealed packets should not be used if any packets are opened or torn.

Expiration dates and lot numbers can typically be found on the packaging, and it is advised to discard any unused product after the expiration date.