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Gaviscon Infant

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Gaviscon Infant

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Medically reviewed

Marina Burgos

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.

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Overview of Gaviscon Infant

Quick Facts

Property Description
Active ingredients Sodium alginate, Magnesium alginate
Form Powder for oral suspension (in sachets)
Pharmacological class Reflux Suppressant (ATC Code: A02BX13)
General purpose Prevention of gastric regurgitation / stabilization of stomach contents
Origin Derived (from brown seaweed)

What is Gaviscon Infant?

Gaviscon Infant is a specialized paediatric anti-reflux preparation classified as a Reflux Suppressant, belonging to the group of Other Drugs for Gastro-oesophageal Reflux Disease (GORD). It is a combination product supplied as a powder for oral suspension intended for oral administration. This specific formulation is distinguished by its direct targeting of the infant population, offering a mechanism that is widely supported by pharmacological studies for safety and efficacy in young patients.

The Composition and Origin of the Paediatric Reflux Suppressant

The product contains the active ingredients sodium alginate and magnesium alginate, which are pharmaceutical salts of alginic acid. These components are derived from natural sources, specifically the cell walls of brown seaweed, classifying the product as derived, not purely synthetic. The formulation is completed with an anhydrous powder base containing excipients, such as Mannitol and Colloidal silica, which are necessary for the product's stability and its proper dissolution when it interacts with stomach fluids. The use of this specific alginate combination is clinically recognized for creating a stable, physical barrier in the stomach.

General Purpose: Stabilizing Gastric Contents

The general purpose of this medicine is to physically mitigate the upward flow of stomach contents, a phenomenon known as gastric regurgitation or gastro-oesophageal reflux (GOR). It functions via Raft Formation, whereby the alginates react with acidic contents to rapidly form a cohesive, low-density viscous gel barrier on the surface of the gastric fluid. This primary mechanism is non-systemic, meaning the active ingredients are not absorbed into the body, offering a localized means of relief from the physical discomfort associated with reflux in infants.

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What side effects are possible with Gaviscon Infant?

Possible side effects and safety information

The officially documented safety profile for this medicine is based on classifications from government regulatory authorities and focuses on specific gastrointestinal risks and population-specific contraindications.


Documented Adverse Reactions

Adverse reactions are primarily associated with the gastrointestinal system, as classified in official regulatory documents. Safety classifications may vary by region; the following terminology is based on the European Summary of Product Characteristics (SmPC).

Classification System-Organ Class (SOC) Documented Effects
Very Rare (< 1/10,000) Gastrointestinal Disorders Constipation, Diarrhoea
Not Known Immune System Disorders Hypersensitivity reactions
Not Known Gastrointestinal Disorders Intestinal obstruction, Bezoar formation, Flatulence, Abdominal distension

Serious Adverse Reactions and Safety Constraints

Serious Adverse Reactions

The physical, non-systemic nature of the product is associated with documented risks of serious events related to the formation of an intragastric mass (bezoar) and subsequent intestinal obstruction, particularly when the concentration of the product is excessive.

Safety-Related Restrictions and Limitations

  • Concurrent Use: The use of Gaviscon Infant is restricted when administered alongside other thickening agents or infant milk preparations that already contain a thickening agent. This restriction addresses the documented risk of over-thickening of the stomach contents.
  • Population-Specific Contraindications: The product is officially contraindicated in infants with known or suspected impairment of renal function due to the risk of hypernatraemia (high sodium levels) from the product’s sodium content. It is also contraindicated in infants with established diarrhoea. Use in premature infants or those under one month of age is defined as requiring medical supervision.
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Overdose and Emergency Response

Overdose and when to seek help

The official regulatory documentation addresses potential manifestations and required actions following Gaviscon Infant overdosage. The symptoms are primarily related to the physical action and salt content of the formulation.


Overdose Manifestations Severe Outcomes and Actions Required
Abdominal distension Intestinal obstruction (possible outcome of non-resolving mass)
Intragastric mass (alginate-milk complex) Surgical or endoscopic removal (required if mass does not resolve spontaneously)
Hypernatraemia (elevated sodium levels) Severe hypernatraemia (requires cautious management with hypo-osmotic solutions)

Special Considerations and Required Management

Overdosage is documented as carrying an explicit risk of hypernatraemia, particularly in infants with known or suspected impairment of renal function due to the preparation's sodium content. Management is symptomatic and requires immediate discontinuation of the product. Due to the potential for severe outcomes, including non-resolving intragastric mass formation, monitoring of fluid and electrolyte balance is mandated. Urgent medical attention must be sought when signs of overdose are present, as the documented potential for intestinal obstruction or severe electrolyte imbalance necessitates hospital-level care for observation and definitive procedural intervention.

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Therapeutic Uses of Gaviscon Infant

What Gaviscon Infant Treats: Main Uses and Benefits

Gaviscon Infant is commonly used to provide symptomatic relief for specific issues related to the digestive system in babies. It focuses on easing discomfort and reducing the noticeable distress caused by common infant conditions.


Easing Symptoms of Regurgitation and Reflux

This medication is used to address the characteristic symptoms of gastro-oesophageal reflux (GOR) and gastric regurgitation in infants. The therapeutic benefit is to help address the symptoms, which contributes to easing the overall symptom load and supports the infant during symptomatic periods. The main indications covered include reflux and regurgitation associated with hiatus hernia.

“The medication is relevant in contexts marked by increased discomfort or tension where symptomatic assistance is appropriate.”

Quick Fact: Used for managing symptoms of Regurgitation and Reflux


Providing Comfort for Digestive Discomfort

Gaviscon Infant is applied in contexts marked by increased discomfort or tension where the infant experiences symptoms related to physical discomfort linked to feeding and digestive issues, such as mild irritation associated with reflux. The key benefit is offering a measure of symptomatic relief that supports patients during episodes of heightened discomfort, contributes to improved day-to-day comfort during symptomatic periods. This is relevant for easing symptoms that interfere with daily comfort.

Regulatory References

  1. Health Products Regulatory Authority (HPRA) SmPC
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Eligibility and Restrictions for Use

Who can and cannot use Gaviscon Infant — Official Regulatory Information


Eligibility Scope

The product is officially designated for infants and young children primarily between the ages of one and two years. Use is not suitable for children over two years of age, adults, or the elderly. The medicine is contraindicated in premature infants and any infant with known hypersensitivity to the active ingredients or excipients.

Age-Related Eligibility Rules

Use in infants under one year is restricted and requires medical supervision or professional recommendation. Regulatory labels clearly state the product is not suitable for use in older children, adolescents, or adults.

Condition-Specific Eligibility Rules

The medicine is contraindicated in infants with known or suspected impairment of renal function due to its sodium content. Use is also prohibited in cases of intestinal obstruction, established diarrhoea, or when there is a risk of excessive water loss (such as with fever or vomiting). The product must not be used concurrently with other feed thickening agents or infant milk preparations containing thickeners.

Pregnancy and Lactation Eligibility Status

Regulatory documentation states that these sections are Not relevant for this paediatric-only product.

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What should I know about interactions with other medicines?

Interactions with Other Medicines and Products

Official regulatory information for Gaviscon Infant primarily focuses on physical interactions due to its non-systemic mode of action. These interactions result in specific constraints on co-administration with other products and in certain patient populations.


Contraindicated Combinations and Dietary Restrictions

Classification Interacting Product Category Rationale
Contraindicated Thickening agents or infant milk preparations containing a thickening agent Prohibited due to the risk of over-thickening of the stomach contents.

Absorption Interference and Timing Separation

The product can physically interfere with the absorption of various orally administered medicines, potentially leading to reduced effectiveness of the co-administered drug. To mitigate this risk, a 2-hour time-interval should be considered between Gaviscon Infant and a range of oral medicines, including:

  • Tetracyclines
  • Digoxin
  • Iron salts
  • Thyroid hormones
  • Glucocorticoids

Population-Specific Constraints

The medicine is subject to constraints based on the risk of hypernatraemia (high sodium concentration) associated with its formulation:

  • Impaired Renal Function: The product is not to be used in infants with known or suspected impairment of renal function.
  • Excessive Water Loss Conditions: Use is restricted in conditions where excessive water loss is likely (e.g., fever, vomiting, or diarrhoea).
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Mechanism of Action

Gaviscon Infant operates via a non-systemic, physical mechanism, involving no absorption or interaction with biological receptors or enzymes. Its function is initiated by a rapid, pH-dependent chemical reaction in the gastric lumen. The soluble alginate salts (sodium and magnesium) immediately precipitate upon contact with the highly acidic gastric fluid ( HCl), forming an insoluble, viscous layer of alginic acid. Simultaneously, carbon dioxide ( CO2) is released and entrapped, providing buoyancy to the newly formed gel.

The buoyant, cohesive structure forms a raft that floats directly on the surface of the stomach contents. This stable layer acts as a physical barrier, effectively capping the fluid below it. This mechanical containment prevents the physical upward displacement of acidic gastric contents past the gastro-oesophageal junction, which is the sole physiological effect of the mechanism: providing a mechanical shield for the oesophageal mucosa. The magnesium alginate component complements the sodium salt, enhancing the structural integrity and viscosity of the raft, which contributes to increased persistence of the barrier structure. The mechanism is strictly constrained by gastric acidity; the necessary chemical precipitation fails if the stomach pH is too high.

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Dosage and Administration Information

How to Use Gaviscon Infant

Administration of Gaviscon Infant must follow the specific instructions outlined in the documentation for this specialized paediatric preparation. The guidelines specify the dose, method of preparation, and timing relative to feeding.

Official Route and Dosage

Instruction Detail
Route of Administration Oral route, only after mixing with a suitable liquid.
Target Population Infants and Young Children (up to 2 years old).
Dosing Schedule Infants under 4.5 kg (10 lb): One sachet per dose.
Infants 4.5 kg (10 lb) and over: Two sachets per dose.
Maximum Frequency Not more than six times in any 24-hour period.

Preparation and Timing

Preparation of the powder for oral suspension must occur immediately before use. The powder is mixed with a prescribed amount of liquid, which determines the administration method:

  • Bottle-Fed Infants: The sachet(s) must be mixed into a specific volume of feed (115 ml for one sachet). The mixture is then given orally as part of the feed.
  • Breast-Fed Infants: The sachet(s) are reconstituted with a small volume of cooled boiled water (total 15 ml), which is then administered by spoon or bottle after or part way through the feed.

Administration Conditions

The medicine is designed to be given after every feed or meal to ensure the dose is correctly positioned. Adherence to the prescribed liquid volume during mixing is required. The product is not suitable for use in infants with known or suspected impairment of renal function due to its sodium content.

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Recent Clinical Evidence

Research Evidence for Gastro-oesophageal Reflux and Regurgitation Symptoms

Research examined this medicine's components in infants experiencing conditions characterized by fluctuating or episodic manifestations, specifically Gastro-oesophageal Reflux (GOR) and frequent regurgitation. The evidence base primarily involves Randomized Controlled Trials (RCTs) and Systematic Reviews. In these studies, researchers monitored outcomes related to physical discomfort and patient-reported outcomes describing perceived discomfort. Objective methods, such as pH-Multiple Intraluminal Impedance (pH-MII) monitoring, were also used to measure GOR events; however, findings were mixed regarding consistency between objective and subjective reports.

Evidence in Different Infant Populations

This research has primarily focused on infant populations up to 12 months of age. Specific studies explored how the medicine was observed in subgroups, including formula-fed and breast-fed babies. The results apply only to the populations studied, meaning findings describe group patterns related to infants with functional symptoms. Data for certain complex groups, such as those with severe underlying health conditions or comorbidities, remain insufficient to draw broad conclusions.

Follow-up Duration and Research Uncertainties

The observation periods in the research were generally short-term, often limited to 24 to 48 hours for objective monitoring or a few weeks for symptom-based trials. Because the follow-up durations were limited and sample sizes were modest, long-term effects are not fully established. Systematic reviews describe the evidence base as limited and heterogeneous, noting that the overall level of certainty remains low for forming definitive clinical conclusions across the whole infant population. Key research uncertainties include the ongoing need for larger studies and clarification on the inconsistency between objective physiological measurements and parent-reported outcomes.

Key Studies & References

  1. Health Products Regulatory Authority (HPRA) Summary of Product Characteristics (SmPC) for Gaviscon Infant
  2. Effect of alginate on reflux assessed by multiple intraluminal impedance/pH monitoring in infants with symptoms of gastro-oesophageal reflux.
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Frequently Asked Questions (FAQ)

Common questions about Gaviscon Infant (FAQ)


Q: What is the main difference between Gaviscon Infant and adult Gaviscon?

Gaviscon Infant is a specialized pediatric formulation designated for children up to two years old. According to official product information, a key distinction is that Gaviscon Infant contains less sodium compared to the standard Gaviscon preparations intended for adults. The lower sodium content reflects a specific formulation requirement for the infant population.


Q: Why is Gaviscon Infant sometimes prescribed for reflux in babies?

The medicine is intended for the symptoms of gastro-oesophageal reflux (GOR) and frequent regurgitation. Official documents describe its function as forming a physical barrier, or 'raft,' over the surface of the stomach contents. This barrier mechanically acts to prevent the upward displacement of stomach contents, a function intended to mitigate the associated physical discomfort.


Q: Can Gaviscon Infant be used for silent reflux, or just obvious spitting up?

The product is indicated for the symptoms of gastro-oesophageal reflux. Official patient information acknowledges that reflux symptoms can include bringing up milk or sometimes showing signs of distress without visible spitting up, which is often referred to as silent reflux. Its use is focused on managing the physical symptoms of reflux regardless of whether regurgitation is observable.


Q: How quickly should Gaviscon Infant start to work after giving it?

The medicine is a non-systemic product, meaning its action is immediate and localized within the stomach. Regulatory information indicates that the active ingredients are designed to react rapidly with stomach acid upon ingestion. This reaction promptly forms the buoyant gel raft, which serves as the physical mechanism of action.


Q: How long does the effect of one dose of Gaviscon Infant typically last?

The effect is related to the persistence of the physical barrier formed in the stomach. Official documents for alginate-based products generally describe the raft as floating on the stomach contents, effectively impeding gastro-oesophageal reflux for up to four hours.


Q: Is Gaviscon Infant known to interact with any common vitamins or supplements for babies?

Because the product works physically in the stomach, it can interfere with the absorption of other orally administered medicines. Official guidance advises that a 2-hour time interval should be considered between giving Gaviscon Infant and giving other oral medicines. This separation principle is generally considered relevant for other oral co-administered products, which may include certain vitamins or supplements.


Q: Is Gaviscon Infant sugar-free or does it contain sweeteners?

Official product information confirms that Gaviscon Infant is formulated to be sugar-free. It does contain other excipients, such as mannitol, which is a sugar alcohol sometimes used as a sweetener, but it is free of conventional sugar.


Q: Is Gaviscon Infant available in different flavors?

The product is supplied as a powder in individual sachets. The official product label and information confirm that Gaviscon Infant is an unflavored preparation.


Q: What are the possible signs that Gaviscon Infant is not working for a baby?

Official prescribing guidance advises that if a baby’s symptoms of reflux do not improve, or if they persist or worsen after a trial period of one to two weeks, the situation warrants reassessment according to clinical guidance. If symptoms do not improve after this trial period, the situation warrants reassessment according to clinical guidance.


Q: What happens if a baby spits up right after taking Gaviscon Infant?

Patient-facing materials associated with the product advise on how to handle regurgitation immediately after dosing. Information indicates that if a child is sick less than 30 minutes after receiving a dose, the same dose is sometimes advised to be given again. If the sickness occurs after 30 minutes, guidance indicates waiting until the next scheduled dose.


Q: Can I mix Gaviscon Infant with formula milk or only breast milk?

Preparation instructions differ based on feeding method. For bottle-fed infants, official guidelines state that the sachet(s) must be mixed into the infant’s feed, which can include formula milk or expressed breast milk. For infants receiving breast milk directly, the powder is mixed with a small volume of cooled boiled water and administered separately.


Q: Is it common for babies to refuse the feed after Gaviscon Infant has been added?

The official preparation instructions acknowledge that adding the powder to a feed increases its thickness. Guidance notes that this change in consistency may interfere with the baby's sucking, which could potentially result in feeding difficulty or refusal.


Q: What is the difference between Gaviscon Infant and a general thickener for feeds?

Gaviscon Infant is an alginate-based reflux suppressant that forms a distinct, floating physical gel layer, or raft, in the stomach. General feed thickeners, typically made from starch or gum, increase the overall viscosity of the entire liquid feed. Official guidelines prohibit using Gaviscon Infant concurrently with any other thickening agents.


Q: What are the most common reported side effects besides stomach issues?

Official regulatory documents classify adverse reactions primarily in the gastrointestinal system, listing issues like constipation and diarrhea as very rare or of unknown frequency. No other common non-gastrointestinal effects are documented in the Summary of Product Characteristics.


Q: Why do some users report Gaviscon Infant makes the feed thicker?

The effect of the product on the feed's consistency is officially noted in its preparation guidance. Instructions state that the product increases the thickness of the feed, which is a known physical consequence of mixing the powder with liquid.


Q: What research exists regarding the effect of Gaviscon Infant on stomach pH levels?

The product is classified as a reflux suppressant, not an acid neutralizer. Its mechanism involves a pH-dependent reaction to create a physical raft of near-neutral pH, but official documents do not state that the product changes the stomach’s overall acid level (its pH level). The raft is designed to protect the esophagus, not neutralize the gastric fluid.


Q: Is it normal for a baby's stools to change consistency when using Gaviscon Infant?

Official prescribing guidance notes that the product may cause a change in the baby's stool consistency. Constipation is specifically mentioned in regulatory-derived patient information as a common, potential effect associated with the use of the medicine.


Q: Is Gaviscon Infant designed to prevent vomiting entirely or just to reduce reflux symptoms?

The medicine is indicated for the management of gastric reflux and regurgitation. Its primary purpose is to physically stabilize stomach contents and prevent the upward flow associated with these symptoms. While vomiting is sometimes a symptom of reflux, the product's action is focused on the mechanical stabilization of the stomach contents.

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How should Gaviscon Infant be stored and disposed of?

Storage and Disposal of Gaviscon Infant Powder

Official regulatory information specifies strict conditions for storing and disposing of Gaviscon Infant powder.

Storage Requirements

  • Temperature: The product must be stored at a temperature not exceeding 30°C and should not be refrigerated or frozen.
  • Container Integrity: The medicine must be kept in the original sachets. Do not use the powder if the sachet is damaged.
  • Stability: The powder sachet must be opened and the suspension prepared immediately before use; the prepared mixture must not be kept for later.
  • Child Safety: Store Gaviscon Infant out of the sight and reach of children.

Disposal Instructions

Unused or expired Gaviscon Infant must not be disposed of via household waste or flushed down the drain. To ensure environmental safety, official labeling instructs users to ask a pharmacist for guidance on how to properly discard the unused medicine.

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

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