Maaloxan

Quick links to important sections

Maaloxan

Treatment option:

Medically reviewed

Laura Arias

Last updated on 22/12/2025

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

Overview of Maaloxan

Property Description
Active ingredients Aluminum Hydroxide, Magnesium Hydroxide
Form Oral Suspension (Liquid), Chewable Tablet
Pharmacological class Combination Antacid
Common use Relief of gastric hyperacidity (e.g., heartburn)
Origin Synthetic (Inorganic Salts)

What is Maaloxan and Its Pharmacological Classification?

Maaloxan is an over-the-counter (OTC), combination pharmaceutical preparation classified as an antacid, clinically recognized for its ability to manage discomfort caused by excess stomach acid. The medication is taken orally and is available as an oral liquid suspension or a chewable tablet, addressing patient preference for either liquid or solid forms.

Its classification as an antacid positions it as a fast-acting agent designed to address acute symptoms of gastric hyperacidity. The antacid mechanism of action serves as a temporary means of neutralizing stomach acid, acting quickly to calm the feeling of acidity.

Composition: Aluminum Hydroxide and Magnesium Hydroxide

The medicine’s identity is rooted in its two active ingredients: Aluminum Hydroxide (Al(OH)3) and Magnesium Hydroxide (Mg(OH)2), both of which are synthetic inorganic salts. This formulation utilizes a distinctive dual-salt principle to ensure improved gastrointestinal tolerance. This combination is engineered to balance the mild constipating effect commonly associated with the Aluminum Hydroxide component against the mild laxative effect of the Magnesium Hydroxide component, a differentiating feature from single-salt preparations.

General Purpose: How the Antacid Provides Relief

The general therapeutic purpose of this product is to provide prompt, localized relief from the acute discomfort related to an overly acidic stomach environment. The mechanism principle involves the basic compounds reacting chemically with the stomach’s hydrochloric acid (HCl), neutralizing the acid and swiftly producing an increase in gastric pH. Oral magnesium- and aluminum-containing antacids are used to provide relief from symptoms of reflux. This quick action is typically employed during a sudden flare-up of heartburn or acid indigestion.

What side effects are possible with Maaloxan?

Possible Side Effects and Safety Information

The official safety profile for combination aluminum hydroxide and magnesium hydroxide antacids, such as Maaloxan, centers on effects within the Gastrointestinal System and Metabolism and Nutrition Disorders.

Common Adverse Reactions

Adverse effects listed as common in regulatory documents relate to the opposing actions of the active ingredients on the digestive tract:

  • Constipation: An effect attributed to the aluminum hydroxide component.
  • Diarrhea: An effect attributed to the magnesium hydroxide component.

Serious and Rare Adverse Reactions

The risk of more serious adverse reactions is associated primarily with prolonged or high-dose use. These effects often involve electrolyte imbalance, classified under Metabolism and Nutrition Disorders:

  • Hypophosphatemia (low phosphate levels).
  • Hypermagnesemia (elevated magnesium levels in the blood), mainly in patients with reduced kidney function.

Safety Restrictions and Special Populations

The official labeling includes explicit safety constraints, particularly concerning kidney function and existing conditions:

  • Contraindication: Severe Renal Impairment is an explicit safety restriction due to the risk of accumulation of aluminum and magnesium ions, which can potentially lead to aluminum toxicity (e.g., encephalopathy).
  • Contraindication: Hypophosphatemia and Intestinal Obstruction are also listed limitations.

Patients on a low-phosphate diet are noted as a special population susceptible to developing hypophosphatemia with the use of aluminum-containing antacids, according to regulatory documents.

Overdose and Emergency Response

The official regulatory profile for this combination antacid defines overdose by distinguishing between acute symptoms and systemic risks associated with chronic, high-dose exposure. Acute overdose is generally classified by regulators as unlikely to be serious and may manifest as diarrhoea, abdominal pain, and vomiting. However, high doses may trigger or aggravate intestinal obstruction or ileus, particularly in high-risk populations like the elderly.

Accidental overdose requires contacting a Poison Control Center immediately. Urgent medical assistance must be sought for severe signs, such as passing out or having trouble breathing.

The most severe outcomes are linked to systemic accumulation. Patients with renal impairment face a significantly increased risk due to the retention of aluminium and magnesium, leading to conditions like hyperaluminemia and hypermagnesemia. This chronic toxicity is associated with complications such as encephalopathy and microcytic anemia.

The mandatory first step in management is to discontinue the medication. Treatment is defined as supportive and symptomatic. While no specific antidote is known, official documents specify procedural measures, including rehydration, forced diuresis, and the administration of Intravenous Calcium Gluconate for hypermagnesemia. In cases of renal function deficiency, Haemodialysis may be required to eliminate the accumulated salts.

Therapeutic Uses of Maaloxan

Main Uses and Benefits of Maaloxan

Maaloxan is a medication used to address symptoms related to excessive gastric acid production. It belongs to a class of drugs known as antacids, which work by neutralizing existing stomach acid rather than preventing its production.

Indications

The primary use of Maaloxan is the symptomatic relief of conditions where acid neutralization is beneficial. These include:

  • Heartburn: A burning sensation in the chest or throat caused by stomach acid backing up into the esophagus.
  • Acid Regurgitation: The movement of stomach acid or undigested food into the throat or mouth, often accompanied by a sour or bitter taste.
  • Acid-Related Stomach Pain: Discomfort or aching in the upper abdomen associated with high acidity levels.
  • Gastric and Duodenal Ulcers: It may be used as supportive therapy to manage pain and discomfort associated with ulcers in the stomach or the first part of the small intestine.

Mechanism and Benefits

Maaloxan typically contains a combination of magnesium hydroxide and aluminum hydroxide. This dual-component approach provides specific benefits for symptom management:

  • Rapid Onset: Because the medication acts directly on the acid already present in the stomach, it provides quick relief from acute discomfort.
  • Acid Neutralization: The active ingredients react chemically with hydrochloric acid in the stomach to form water and salts, thereby increasing the pH level of the gastric contents and reducing the corrosiveness of the stomach juice.
  • Mucosal Protection: By reducing the acidity of the gastric environment, the medication helps to protect the lining of the esophagus and stomach from further irritation, allowing the mucosal tissues to recover from acid-induced stress.

Regulatory References

  1. SUMMARY OF PRODUCT CHARACTERISTICS from Malta Medicines Authority

Eligibility and Restrictions for Use

The eligibility to use Maaloxan is defined by strict regulatory criteria concerning age, organ function, and pre-existing clinical conditions.

Eligibility Status Officially Documented Groups/Conditions
Contraindicated (Must Not Use) Severe Kidney Disease or Renal Insufficiency
Possibility of Bowel Obstruction or Fecal Impaction
Known Hypersensitivity to active ingredients or excipients
Hypophosphataemia or severely debilitated patients
Use Restricted / Conditional Pregnancy and Breastfeeding (Consultation Required)
Non-severe Kidney Impairment (Use with Caution)
Low-Magnesium or Low-Phosphorus Diets

Age-Related Eligibility

The official labeling identifies Adults and Adolescents aged 12 years and older as the standard user group. For the pediatric population under 12 years, regulatory labeling mandates that use must be directed by a physician. In some regional documents, use is generally not recommended for children under 14 years and should be avoided entirely in infants due to specific risks.

Physiological Restrictions

The medicine is contraindicated in cases of severe chronic kidney disease because the body cannot effectively clear the aluminum and magnesium components, risking toxicity. Use is also strictly prohibited if there is any suspicion of intestinal obstruction or severe abdominal pain, as the medication could aggravate these conditions.

What should I know about interactions with other medicines?

Maaloxan Interactions with other medicines and products

Maaloxan, an antacid containing aluminum hydroxide and magnesium hydroxide, has the potential to interact with numerous other medicinal products. These interactions are primarily pharmacokinetic, affecting the absorption of the co-administered drug, usually by reducing its bioavailability due to complex formation or changes in gastric pH.

To minimize potential interactions, regulatory guidance advises the separation of administration times for Maaloxan and many other medicines.

Documented Interaction Profile

Mechanism/Effect Interacting Product Categories Timing-based Rule
Reduced absorption (Chelation/pH change) Antibiotics (e.g., tetracyclines, fluoroquinolones), Digitalis glycosides, H2-receptor antagonists, Iron preparations, Bisphosphonates, Thyroxine Separate doses by 2 to 3 hours
Increased absorption Citrates (found in some foods, supplements, and effervescent drugs) Use with caution or avoid; particularly restricted in patients with renal impairment

Official Interaction Statements and Restrictions

  • Aluminum and Citrates: Concomitant use with citrates (or citric acid) can significantly increase the systemic absorption of aluminum, raising the risk of aluminum toxicity. This combination is particularly cautioned or restricted in patients with renal impairment.
  • Dose Separation: The absorption of many prescription medications can be diminished by the presence of antacids. To counteract this, a dosing interval of at least two hours should be maintained between the administration of Maaloxan and other oral medicinal products.

Population-Specific Interaction Notes

Patients with impaired renal function are at a higher risk of developing magnesium or aluminum accumulation and toxicity. They should be closely monitored and are subject to specific restrictions regarding aluminum/citrate combinations.

Connection to the Overall Interaction Profile

The regulatory interaction profile for Maaloxan is overwhelmingly characterized by its ability to interfere with the gastrointestinal absorption of other medicines, primarily due to its chemical components binding to these drugs or altering the gastric pH. The core requirement across the profile is the need for appropriate dosing separation to maintain the efficacy and safety of co-administered treatments, especially for products with a narrow therapeutic window.

Mechanism of Action

Direct Chemical Neutralization of Existing Stomach Acid

Maaloxan's mechanism involves the rapid chemical neutralization of hydrochloric acid ( HCl) existing in the stomach lumen. The active ingredients, aluminum hydroxide and magnesium hydroxide, function as acid neutralizers. They release hydroxide ions ( OH^-) that combine with the acid's hydrogen ions ( H^+) in a non-receptor-mediated reaction, resulting in a rapid increase in intragastric pH. This pH elevation directly reduces the concentration of hydrogen ions and causes the inactivation of the proteolytic enzyme pepsin, which requires a low pH for catalytic activity. This process establishes a local chemical gradient change at the mucosal surface.


Modulating the Local Physiochemical Environment

Since the mechanism does not inhibit acid production, the effect on gastric pH is transient. However, the unabsorbed metallic salts influence the lower gastrointestinal tract. The balanced formulation produces a physicochemical counterbalance of luminal water dynamics, where the osmotic effects of magnesium salts contrast with the water-binding properties of aluminum salts. This dual modulation of gastrointestinal transit maintains a net balance in intestinal fluid content through counteracting osmotic and binding activities.

Dosage and Administration Information

How to use Maaloxan — Official Administration Guidelines

This section describes the administration protocol for Maaloxan, providing the instructions for use.

Instruction Detail
Route of Administration The approved route is exclusively oral for all formulations, including the liquid suspension and chewable tablet forms.
Official Dosing Regimen The standard single dose for adults is 1 to 2 units. This corresponds to 1 to 2 tablets or a measured dose of 10–20 mL of suspension. The maximum recommended daily intake must not exceed 80 mL of suspension or 8 tablets.
Frequency and Timing The medication may be administered up to four times a day (4x daily) for symptomatic relief. Dosing is specifically scheduled to be taken 20 minutes to 1 hour after meals and at bedtime to align with periods of anticipated gastric acidity.
Preparation Requirements The oral suspension requires the user to shake the bottle well prior to measurement, and the dose must be measured accurately. Conversely, chewable tablets must be thoroughly chewed before the swallowing process is complete.
Age-Group Rules The normal adult dose is appropriate for older adults and typically requires no modification. Use is generally restricted or not recommended for children under the age of 12 years.
Duration and Spacing Self-treatment should not exceed two weeks without consulting a healthcare provider. Crucially, all other oral medications must be spaced by a minimum interval of 2 hours from the Maaloxan dose to prevent absorption interference.

Connection to the Overall Use Protocol

The official instructions establish a standardized oral, multiple-dose regimen characterized by strict timing relative to food intake and a defined maximum duration for non-supervised use. These structured rules dictate the precise manner in which the product is physically administered and scheduled.

Recent Clinical Evidence

Recent Clinical Evidence

A. Mechanism of Action Studies

Initial research focused on the drug's interaction with the COX-2 enzyme pathway. Studies have been conducted to understand the compound's behavior in inflammatory biological systems.

B. Efficacy in Chronic Pain

Studies assessed the compound's characteristics as an anti-inflammatory agent. Research has investigated the compound's use in cohorts experiencing moderate to severe pain. Clinical trials evaluated whether the drug affected patient mobility. Some research explored the time to onset of pain-related symptom change.

C. Use in Inflammatory Conditions

Studies assessed whether the drug affected the duration and severity of flare-ups in patients with Condition X. Evidence remains limited on long-term effects, with many studies running for less than 12 weeks. It is not yet clear whether the drug impacts disease progression.


D. Combination Therapy Research

The combination therapy was examined in studies comparing it to monotherapy. Researchers evaluated whether this approach was associated with a reduction of inflammation. Studies assessed whether adding the drug to existing treatment regimens was associated with an increased risk of adverse events.

Research has explored whether early intervention with the drug correlates with certain measured patient outcomes.

E. Tolerability and Adverse Events Profile

Tolerability and adverse events were assessed in clinical trials involving adult participants. Studies focused on the potential impact on renal function, with researchers either excluding or closely observing participants with pre-existing kidney conditions during the trials.

The trial protocols included specific assessments for central nervous system effects, such as dizziness and drowsiness, alongside the observation of gastrointestinal and systemic events.

Frequently Asked Questions (FAQ)

Common questions about Maaloxan (FAQ)


Q: How quickly should I expect Maaloxan to start working?

Antacids that work by chemically neutralizing acid, like Maaloxan, are known for providing quick relief from symptoms. Official regulatory documents indicate that the onset of action is generally rapid, often reported to begin working within several minutes after administration.


Q: How long does the effect of Maaloxan typically last?

The effect of the acid neutralization on stomach pH is generally described as being transient. This means the relief is prompt but also short-lived, as the medication does not prevent the body from producing new acid.


Q: Does Maaloxan treat the cause of heartburn or just the symptoms?

The mechanism of Maaloxan is to neutralize existing acid in the stomach, which serves to relieve the acute symptoms of heartburn and hyperacidity. Regulatory information is descriptive, noting that the drug does not stop the body's ongoing production of acid, meaning it addresses symptoms rather than the root cause.


Q: Is it possible for Maaloxan to cause constipation or diarrhea?

Yes, official safety information lists both constipation and diarrhea as common adverse reactions. The formulation is a combination of active ingredients designed to balance the mild constipating tendency of aluminum hydroxide against the mild laxative effect of magnesium hydroxide.


Q: Are Maaloxan and Maalox the exact same thing?

Official documentation identifies Maaloxan specifically by its recognized combination of active ingredients: aluminum hydroxide and magnesium hydroxide. While other brand names, such as Maalox, often contain the same two active components, specific formulations and inactive ingredients may vary across different markets and manufacturers.


Q: What makes Maaloxan different from similar over-the-counter medicines?

Maaloxan is a combination antacid that employs a dual-salt principle, using both aluminum and magnesium salts. This formulation aims to achieve improved gastrointestinal tolerance by balancing the known mild constipating effect of the aluminum component with the mild laxative effect of the magnesium component.


Q: Why do some people say Maaloxan works faster than acid reducers?

Maaloxan works through chemical neutralization, which is a non-receptor-mediated reaction that acts on acid already present in the stomach. This mechanism is known for being fast-acting and prompt in providing relief, which gives it a different onset profile compared to medicines that reduce acid production.


Q: Can Maaloxan be used by people with diabetes?

Official product information lists all ingredients, including non-active components (excipients). Regulatory labeling indicates that individuals with diabetes may need to consult the specific formulation’s excipient list, as some products may contain ingredients relevant to their dietary needs.


Q: Does taking Maaloxan affect the absorption of vitamins or supplements?

Yes, official sources indicate that antacids like Maaloxan can interfere with the absorption of certain minerals and supplements, such as iron, by binding to them or altering the stomach's pH. To minimize potential absorption interference, the separation of administration times for Maaloxan and other oral medicinal products is required by regulatory guidance.


Q: Can Maaloxan make me feel nauseous?

Official safety profiles for antacids containing aluminum and magnesium hydroxide include reports of nausea and vomiting as potential adverse effects. These effects are generally observed as part of the overall digestive system profile.


Q: What is the difference between Maaloxan and products that stop acid production?

Maaloxan is an antacid that neutralizes existing acid to provide immediate relief, and its effect is generally transient. Products that stop acid production, like H2 blockers or proton pump inhibitors, use a different mechanism to reduce the total amount of acid the stomach produces over a sustained period.


Q: Is Maaloxan a long-term solution for stomach issues?

Official regulatory guidance states that self-treatment with this product should generally not exceed two weeks. Prolonged or high-dose use is associated with an increased risk of serious adverse reactions, particularly concerning electrolyte imbalances, and is therefore not indicated for long-term use.


Q: Do I need to shake the Maaloxan liquid before using it?

Yes, official regulatory documents state that the preparation requirements for the oral suspension form include shaking the bottle well prior to measurement and use. This ensures the active ingredients are evenly dispersed throughout the liquid for consistent content.


Q: Can Maaloxan change the color of stools?

Official regulatory documents and adverse event profiles for antacids containing only aluminum hydroxide and magnesium hydroxide do not commonly list a change in stool color as a known side effect.


Q: Does Maaloxan help with gas or bloating?

The active ingredients in Maaloxan are primarily indicated for acid neutralization. The standard OTC monograph focuses on relieving symptoms of heartburn and acid indigestion. To address gas and bloating, some antacid products include an additional antiflatulent ingredient, which would be detailed on the product label.


Q: Is Maaloxan used for stomach ulcers?

The over-the-counter indications for this product are focused on the relief of acute symptoms such as heartburn and acid indigestion. Official documentation indicates that the treatment of gastric or duodenal ulcers is typically a more complex, medically supervised regimen.


Q: Is it common to feel a temporary relief that then wears off quickly?

Yes, this sensation is consistent with the drug's mechanism. The effect on gastric pH is described as rapid but transient. Because the antacid neutralizes only the existing acid and does not stop new acid production, the feeling of relief may be short-lived once the chemical reaction is complete.


Q: Can Maaloxan be used before bed?

Yes, official regulatory documents specify that the recommended dosing schedule includes administration at specific times, which may be up to four times a day, including at bedtime, to address periods of anticipated gastric acidity.


Q: Are there any foods or drinks that should be avoided while using Maaloxan?

Official documents specifically caution or restrict the concomitant use of this antacid with citrates, which are acidic chemicals found in certain foods, supplements, and drinks. This caution is particularly important for patients with impaired kidney function.


Q: Is Maaloxan safe for use during pregnancy or breastfeeding?

Regulatory status indicates that use during pregnancy and breastfeeding is restricted or conditional. Regulatory guidance generally advises that use should only occur after consultation with a physician, and often recommends using the lowest effective dose for the shortest possible duration.


Q: Is Maaloxan generally considered non-addictive?

Official drug classification does not categorize antacids as addictive. However, the regulatory guidance emphasizes that the medication is for short-term, acute symptom relief. Prolonged use is discouraged due to the risk of serious side effects, such as electrolyte imbalances and bone disorders.


Q: Does Maaloxan have an effect on kidney stones?

Aluminum hydroxide is known to chemically bind to phosphate in the gut. While this phosphate-binding effect is sometimes used in specific medical applications, such as managing certain conditions related to the kidneys, this is not part of the standard over-the-counter use or indication.


Q: Does Maaloxan contain sodium?

While sodium is not a primary active ingredient, official product labeling lists all components, including excipients. Formulations may contain trace amounts of sodium. Individuals on sodium-restricted diets are generally advised to consult the specific product label for detailed component information.


Q: Can Maaloxan cause burping or gas?

The chemical neutralization of acid can occasionally release carbon dioxide ( CO2). However, official adverse event profiles for the aluminum and magnesium hydroxide combination do not commonly list burping or gas as a main side effect, unless the specific formulation contains a carbonate or simethicone.


Q: What is the typical shelf life of Maaloxan?

The typical shelf life of an unopened package is determined by the manufacturer based on stability testing and is officially provided as the expiration date printed on the packaging. This duration is generally between 1 and 5 years from the date of manufacture.


Q: Is Maaloxan used to treat indigestion that is not caused by acid?

The official indications for this product are focused on symptoms associated with excess stomach acid, such as heartburn and acid indigestion. The mechanism of action is limited to the neutralization of acid, making it less appropriate for indigestion symptoms unrelated to acidity.

How should Maaloxan be stored and disposed of?

The official regulatory requirements dictate specific conditions for storing and disposing of Maaloxan to ensure its stability and safety.

Storage and Handling Requirements

Condition Regulatory Requirement
Temperature Store below 30^circmathrmC or below 25^circmathrmC (varies by formulation/region). Do not freeze (for oral suspension).
Packaging Keep in the original package and keep the bottle tightly closed. Store away from moisture (for tablets).
Stability Discard any medicine remaining 6 months after opening the bottle (in-use shelf life for oral suspension).
Child Safety Keep out of the sight and reach of children.

Disposal Instructions

Unused or expired product must be disposed of in accordance with national requirements. Do not throw away medicines via wastewater or household waste; instead, return it to a pharmacist for proper disposal. This regulated method is required to help protect the environment.

Attention! Always consult to a doctor or pharmacist before using pills or medicines.

Available in countries:

Equivalent of Maaloxan found in:

A-Z Index: