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Maximum Strength Antacid and Antigas

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Active ingredients
  • Dimethicone 40 mg/5 mL
  • Aluminum Hydroxide 400 mg/5 mL
  • Magnesium Hydroxide 400 mg/5 mL
Other brand names
Drug classes
Calculi Dissolution Agent, Osmotic Laxative
Dosage form
Liquid
Route
Oral
Prescription status
OTC (over the counter)
Marketed in the U.S.
Since 2012
Label revision date
November 19, 2025
Active ingredients
  • Dimethicone 40 mg/5 mL
  • Aluminum Hydroxide 400 mg/5 mL
  • Magnesium Hydroxide 400 mg/5 mL
Other brand names
Drug classes
Calculi Dissolution Agent, Osmotic Laxative
Dosage form
Liquid
Route
Oral
Prescription status
OTC (over the counter)
CSA schedule
Not a scheduled drug
Marketed in the U.S.
Since 2012
Label revision date
November 19, 2025
Manufacturer
RITE AID PHARMACY
Registration number
M001
NDC root
11822-5742

If you are a healthcare professional or from the pharmaceutical industry please visit this version.

If you are a consumer or patient please visit this version.

Drug Overview

You may find this medication helpful if you experience discomfort from heartburn, sour stomach, acid indigestion, or gas. It works by relieving these symptoms, providing you with a sense of comfort and relief from digestive issues. If you're looking for a solution to these common gastrointestinal problems, this medication could be a suitable option for you.

Uses

If you're experiencing discomfort from heartburn, a sour stomach, or acid indigestion, this medication can help relieve those symptoms. It also addresses issues related to gas, providing you with some much-needed comfort.

You can feel confident using this medication, as there are no known teratogenic effects (which means it doesn't cause birth defects) associated with it. This makes it a safer option for those who may be concerned about such risks.

Dosage and Administration

Before you use this medication, make sure to shake the bottle well to mix the contents properly. If you are an adult or a child aged 12 years and older, you should take 2 to 4 teaspoonfuls of the medication two times a day, unless your doctor has given you different instructions.

For children under 12 years of age, it’s important to consult with a doctor before giving them this medication to ensure it’s safe and appropriate for their age and condition. Always follow your healthcare provider's guidance for the best results.

What to Avoid

There are no specific contraindications, controlled substance classifications, or risks of abuse, misuse, or dependence associated with this medication. This means that, based on the available information, there are no known reasons that would prevent you from using it safely.

However, it's always important to consult with your healthcare provider before starting any new medication to ensure it’s appropriate for your individual health needs. If you have any concerns or questions about this medication, don’t hesitate to reach out to your doctor or pharmacist for guidance.

Side Effects

It's important to be aware of potential side effects when using this medication. You should not exceed 12 teaspoonfuls in a 24-hour period or use the maximum dosage for more than two weeks. If you have kidney disease or are on a magnesium-restricted diet, consult your doctor before using this product. Additionally, if you are taking any prescription medications, it's wise to check with your doctor or pharmacist, as antacids can interact with certain drugs. If you are pregnant or breastfeeding, please seek advice from a healthcare professional before use.

Warnings and Precautions

It's important to use this medication safely. Do not exceed 12 teaspoonfuls in a 24-hour period, and avoid using the maximum dosage for more than two weeks. If you have kidney disease or are on a magnesium-restricted diet, consult your doctor before using this product. Additionally, if you are taking any prescription medications, check with your doctor or pharmacist, as antacids can interact with some drugs. If you are pregnant or breastfeeding, seek advice from a healthcare professional before use.

Always keep this medication out of reach of children. If you experience any severe side effects or unusual symptoms, seek emergency help immediately. If you notice any concerning changes while using this product, stop use and call your doctor right away.

Overdose

It appears that there is no specific information available regarding overdosage for this medication. However, it's always important to be aware of the potential risks associated with taking any medication. If you suspect that you or someone else may have taken too much of a medication, look for signs such as unusual drowsiness, confusion, or difficulty breathing.

In the event of an overdose, it is crucial to seek immediate medical help. You can do this by calling your local emergency number or going to the nearest hospital. Always keep the medication packaging on hand, as it can provide important information to healthcare professionals. Remember, when in doubt, it's better to err on the side of caution and get help.

Pregnancy Use

If you are pregnant or breastfeeding, it’s important to consult with a healthcare professional before using this medication. They can provide guidance on whether it’s safe for you and your baby. Always prioritize your health and the health of your child by seeking expert advice.

Lactation Use

If you are pregnant or breastfeeding, it’s important to consult with a healthcare professional before using any medication. This ensures that you understand any potential risks and can make informed decisions about your health and the health of your baby. Always prioritize open communication with your doctor regarding your breastfeeding journey.

Pediatric Use

If you have a child under 12 years old, it's important to consult with a doctor before using this medication. For children aged 12 and older, as well as adults, the recommended dosage is 2 to 4 teaspoonfuls taken twice a day, or as directed by a healthcare professional. Always follow your doctor's advice to ensure safe and effective use for your child.

Geriatric Use

If you are an older adult or caring for one, it's important to consult with a doctor before using this medication, especially if you have kidney disease or are following a magnesium-restricted diet. These conditions can affect how your body processes the medication, and your doctor can provide guidance tailored to your needs.

For adults and children aged 12 and older, the typical dosage is 2 to 4 teaspoonfuls taken twice a day, or as directed by your healthcare provider. If the person is under 12 years old, it's essential to seek advice from a doctor before administering the medication. Always prioritize safety and proper guidance when it comes to medication use.

Renal Impairment

If you have kidney disease, it's important to consult your doctor before using this medication. Your healthcare provider can help determine if it's safe for you and if any adjustments to your dosage are necessary. Always prioritize open communication with your doctor regarding your kidney health to ensure the best care.

Hepatic Impairment

If you have liver problems, it's important to know that the drug insert does not provide specific information about dosage adjustments, special monitoring, or precautions for your condition. This means that there are no tailored guidelines for how this medication may affect you if you have hepatic impairment (liver issues).

Always consult your healthcare provider for personalized advice and to discuss any concerns regarding your liver health and how it may relate to your treatment. They can help ensure that you receive the safest and most effective care.

Drug Interactions

It's important to have open conversations with your healthcare provider about any medications or tests you may be taking. While there are no specific drug interactions or laboratory test interactions noted for this medication, your healthcare provider can help ensure that everything you are taking works well together and is safe for you.

Always feel free to ask questions and share your complete list of medications and any lab tests you may be undergoing. This way, you can receive the best possible care tailored to your needs.

Storage and Handling

To ensure the best performance of your product, store it at room temperature in a tightly closed container. Avoid freezing, as this can damage the product and affect its effectiveness.

When handling the product, make sure to keep it in a clean environment to maintain its quality and safety. Always follow these storage and handling guidelines to ensure optimal use.

Additional Information

You should take this medication orally. For adults and children aged 12 and older, the recommended dosage is 2 to 4 teaspoonfuls taken twice a day, or as directed by your doctor. If the patient is under 12 years old, it's important to consult a doctor for the appropriate dosage.

FAQ

What symptoms does this drug relieve?

This drug relieves heartburn, sour stomach, acid indigestion, and symptoms referred to as gas.

What is the recommended dosage for adults and children 12 years and older?

Adults and children 12 years of age and older should take 2 to 4 teaspoonfuls two times a day or as directed by a doctor.

What should children under 12 do before using this drug?

Children under 12 years should ask a doctor before use.

Are there any warnings associated with this drug?

Do not take more than 12 teaspoonfuls in a 24-hour period or use the maximum dosage for more than 2 weeks. Consult a doctor if you have kidney disease or are on a magnesium-restricted diet.

What should I do if I am pregnant or breastfeeding?

If you are pregnant or breastfeeding, ask a health professional before use.

How should this drug be stored?

Store at room temperature tightly closed and do not freeze.

Is there any specific instruction for use?

Shake well before each use.

Are there any contraindications for this drug?

No contraindications are listed for this drug.

Packaging Info

Below are the non-prescription pack sizes of Maximum Strength Antacid and Antigas (aluminum hydroxide, magnesium hydroxide, dimethicone). Columns show Packaging, Formulation Type, and Active Ingredient Strength.

Packaging configurations for Maximum Strength Antacid and Antigas.
Details

Drug Information (PDF)

This file contains official product information for Maximum Strength Antacid and Antigas, including active ingredients, dosage, warnings, and labeling as submitted by the manufacturer for OTC distribution.

View product document (PDF)

Description

No description information is available for the drug.

Uses and Indications

This drug is indicated for the relief of heartburn, sour stomach, acid indigestion, and symptoms associated with gas.

There are no teratogenic or nonteratogenic effects associated with this drug.

Dosage and Administration

Healthcare professionals should instruct patients to shake the medication well before each use.

For adults and children aged 12 years and older, the recommended dosage is 2 to 4 teaspoonfuls taken two times a day, or as directed by a physician.

For children under 12 years of age, it is advised to consult a doctor for appropriate dosing recommendations.

Contraindications

There are no contraindications associated with the use of this product. It is deemed safe for use in the absence of specific conditions or situations that would warrant avoidance.

Warnings and Precautions

Patients should not exceed a maximum dosage of 12 teaspoonfuls within a 24-hour period, nor should they utilize the maximum dosage for longer than two weeks. Adherence to these guidelines is essential to prevent potential adverse effects.

Healthcare professionals should advise patients to consult a physician prior to use if they have a history of kidney disease or are on a magnesium-restricted diet. These conditions may necessitate special consideration and monitoring.

Additionally, it is crucial for patients to seek guidance from a healthcare provider or pharmacist before using this product if they are currently taking any prescription medications. Antacids have the potential to interact with certain prescription drugs, which could lead to diminished efficacy or increased side effects.

For individuals who are pregnant or breastfeeding, it is recommended to consult a health professional before use to ensure safety for both the mother and child.

General precautions include the imperative to keep this product out of reach of children to prevent accidental ingestion and potential harm.

Side Effects

Patients should be aware of the potential adverse reactions associated with the use of this medication. It is crucial to adhere to the recommended dosage guidelines, which specify not to exceed 12 teaspoonfuls within a 24-hour period or to use the maximum dosage for more than two weeks.

Patients with kidney disease or those on a magnesium-restricted diet should consult a healthcare professional prior to use. Additionally, individuals taking prescription medications should seek advice from a doctor or pharmacist, as antacids may interact with certain drugs.

For pregnant or breastfeeding patients, it is advisable to consult a health professional before using this medication to ensure safety for both the patient and the child.

Drug Interactions

There are currently no documented drug interactions associated with the use of this medication. Additionally, there is no information available regarding interactions with laboratory tests. As such, no specific recommendations for dosage adjustments or monitoring are warranted at this time.

Packaging & NDC

Below are the non-prescription pack sizes of Maximum Strength Antacid and Antigas (aluminum hydroxide, magnesium hydroxide, dimethicone). Columns show Packaging, Formulation Type, and Active Ingredient Strength.

Packaging configurations for Maximum Strength Antacid and Antigas.
Details

Pediatric Use

Pediatric patients under 12 years of age should consult a healthcare professional before use. For adolescents and adults aged 12 years and older, the recommended dosage is 2 to 4 teaspoonfuls taken twice daily or as directed by a physician.

Geriatric Use

Elderly patients should consult a healthcare provider prior to use if they have a history of kidney disease, as this may impact the safety and efficacy of the treatment. Additionally, those on a magnesium-restricted diet are advised to seek medical advice before initiating therapy.

For adults and children aged 12 years and older, the recommended dosage is 2 to 4 teaspoonfuls taken twice daily or as directed by a healthcare professional. It is important to note that for children under 12 years of age, a healthcare provider should be consulted to determine the appropriate dosage.

Careful monitoring and consideration of individual health status are essential when prescribing this treatment to geriatric patients, particularly in the context of existing medical conditions or dietary restrictions.

Pregnancy

Pregnant patients and those who are breastfeeding should consult a healthcare professional prior to using this medication. It is essential to evaluate the potential risks and benefits associated with its use during pregnancy and lactation.

Lactation

Lactating mothers are advised to consult a health professional prior to using this medication. There is no specific data available regarding the excretion of this medication in breast milk or its effects on breastfed infants. Therefore, caution is recommended when administering this medication to lactating individuals.

Renal Impairment

Patients with renal impairment should consult a healthcare professional prior to use, particularly if they have a history of kidney disease. It is essential to assess renal function and consider potential dosing adjustments or monitoring requirements based on the degree of impairment.

Hepatic Impairment

Patients with hepatic impairment have not been specifically studied in relation to the use of this medication. Consequently, there are no established dosage adjustments, special monitoring requirements, or precautions outlined for individuals with compromised liver function. It is recommended that healthcare providers exercise caution when prescribing this medication to patients with hepatic impairment, given the lack of data on its safety and efficacy in this population. Regular monitoring of liver function may be prudent in these cases, although specific parameters are not defined in the available information.

Overdosage

In the absence of specific overdosage information, it is essential for healthcare professionals to remain vigilant and prepared for potential scenarios involving overdose.

Healthcare providers should be aware that the clinical presentation of an overdose may vary significantly depending on the substance involved and the individual patient’s characteristics. Symptoms may include, but are not limited to, altered mental status, cardiovascular instability, respiratory distress, and gastrointestinal disturbances.

In the event of suspected overdosage, immediate assessment of the patient's condition is crucial. Recommended actions include:

  1. Assessment: Conduct a thorough evaluation of the patient's vital signs and clinical status.

  2. Supportive Care: Initiate supportive measures as necessary, including airway management, oxygen supplementation, and intravenous fluids.

  3. Decontamination: If appropriate and within a reasonable timeframe, consider gastrointestinal decontamination methods such as activated charcoal, provided the patient is alert and able to protect their airway.

  4. Consultation: Engage with a poison control center or toxicology expert for guidance on specific antidotes or additional management strategies tailored to the substance involved.

It is imperative to monitor the patient closely for any evolving symptoms and to provide symptomatic treatment as required. Documentation of the incident and any interventions performed should be meticulously recorded for future reference and quality assurance.

In summary, while specific overdosage information is not available, healthcare professionals should be prepared to act swiftly and effectively in managing potential overdose situations, ensuring patient safety and optimal outcomes.

Nonclinical Toxicology

No teratogenic or non-teratogenic effects have been reported in the available nonclinical studies. Additionally, there is no information regarding animal pharmacology and toxicology. The absence of data limits the assessment of potential risks associated with the use of the compound in question. Further studies may be necessary to elucidate these aspects of nonclinical toxicology.

Postmarketing Experience

No postmarketing experience details are provided in the insert.

Patient Counseling

Healthcare providers should advise patients to keep this medication out of reach of children to prevent accidental ingestion or misuse. It is important to emphasize the necessity of proper storage to ensure the safety of young individuals.

Storage and Handling

The product is supplied in a configuration that includes specific NDC numbers. It is essential to store the product at room temperature, ensuring that the container remains tightly closed to maintain its integrity. Freezing the product is strictly prohibited, as it may compromise its quality and effectiveness. Proper handling and storage conditions are crucial for preserving the product's stability and efficacy.

Additional Clinical Information

The medication is administered orally. For adults and children aged 12 years and older, the recommended dosage is 2 to 4 teaspoonfuls taken twice daily or as directed by a healthcare professional. For children under 12 years of age, it is advised to consult a doctor for appropriate dosing guidance.

There is no additional information available regarding laboratory tests, abuse potential, patient counseling, or postmarketing experience.

Drug Information (PDF)

This file contains official product information for Maximum Strength Antacid and Antigas, including active ingredients, dosage, warnings, and labeling as submitted by the manufacturer for OTC distribution.

View product document (PDF)

Data Generation & Sources

This page was automatically generated and is maintained by the AllDrugs AI Data-Science Team. It was built from the FDA Structured Product Label (DailyMed) for Maximum Strength Antacid and Antigas, retrieved by a validated AI data-extraction workflow.

All FDA-listed dosage forms and strengths are shown in the Packaging & NDC Codes section above. Regulatory status appears in the Summary Information panel above and was verified in the FDA National Drug Code directory and the NSDE NDC Directory daily file.

Note: an automated daemon monitors NSDE checksums; when the record for this NDC changes, the new file is pulled instantly and this page is refreshed.

No human clinician has reviewed this version.

Learn more in our Editorial Policy

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Primary FDA sources:

Orange Book data shown on this page are limited to Regulatory Status (Rx), Established Pharmacologic Class (EPC), and Mechanism of Action (MoA).

Regulatory data notice: Information on this page is reproduced verbatim from FDA public databases (NSDE, Orange Book, Purple Book, DailyMed SPL). NDA/ANDA drugs are FDA-approved, BLA biologics are FDA-licensed. Inclusion alone does not guarantee current market availability or imply FDA endorsement.

Medical disclaimer: This AI-generated content is provided for educational purposes only and does not constitute medical advice. Always consult a licensed healthcare professional for diagnosis or treatment decisions.