Alginic Acid
Derived from brown seaweed, Alginic Acid is used to treat GERD and heartburn symptoms, often in combination with antacids to provide relief.
Alginic Acid is a gastric reflux medication that creates a protective foam barrier to prevent heartburn and acid reflux symptoms.
Key facts at a glance
- ATC
- A02BX13
- RxNorm
- 17305
- Generic
- Alginic Acid
- Class
- atc-a02
- Brands
- —
- Availability
- rx
- Lactation
- unknown
- Routes
- oral
- Forms
- tablet, suspension
- Regions
- US, EU, CN, JP
- Monitoring
- —
This page is for informational purposes only.
Do not use this information to diagnose yourself or to replace a physician's advice. Always consult a qualified healthcare provider before starting, stopping, or changing any medication. If you believe you are experiencing a medical emergency, call your local emergency number immediately.
Dosage and administration
- Usual dose
- 500mg twice daily
- Maximum
- consult physician
- Frequency
- every 12 hours
- Instructions
- Follow physician instructions
- Duration limits
- as prescribed
- Monitoring
- standard
- Usual dose
- 250mg twice daily
- Maximum
- consult physician
- Frequency
- every 12 hours
- Instructions
- Follow physician instructions
- Duration limits
- as prescribed
- Monitoring
- standard
- Usual dose
- 400mg daily
- Maximum
- consult physician
- Frequency
- once daily
- Instructions
- Follow physician instructions
- Duration limits
- as prescribed
- Monitoring
- standard
Overdose information
Special Populations
8 groupspregnancy
first trimesterno adjustment needed
generally considered safe for use during pregnancy
standard prenatal care
pregnancy
second trimesterno adjustment needed
safe to use as needed for GERD symptoms
standard prenatal care
pregnancy
third trimesterno adjustment needed
safe for symptom management
standard prenatal care
lactation
breastfeedingno adjustment needed
considered compatible with breastfeeding
none required
pediatric_age
children 2 12 yearsuse under medical supervision
use only as directed by pediatrician
monitor for proper dosing
Use with caution and monitor for adverse effects.
geriatric
elderly over 65no adjustment needed
safe for use in elderly population
standard monitoring
renal_impairment
mild to moderateno adjustment needed
no dose adjustment required due to minimal systemic absorption
standard monitoring
hepatic_impairment
any severityno adjustment needed
no dose adjustment required due to minimal systemic absorption
standard monitoring
Statistics and clinical data
Commonly used since
Pharmaceutical use in drug formulations
Drug class
ATC Code A02EX - Other drugs for peptic ulcer and GORD
Common uses
Therapeutic and food industry applications
Alginic Acid is used to treat gastroesophageal reflux disease (GERD), heartburn, and symptoms of acid indigestion. It is particularly effective for symptoms that occur after meals or during sleep.
Alginic Acid works by reacting with gastric acid to form a viscous foam that floats on top of the stomach contents. This foam acts as a physical barrier, preventing stomach acid from flowing backward into the esophagus and providing relief from reflux symptoms.
Alginic Acid is often combined with aluminum and/or magnesium antacids for enhanced effectiveness. It should be taken after meals and at bedtime for optimal results. Patients with swallowing difficulties or specific medical conditions should consult a healthcare provider before use.
Contraindications
Conditions and patient states where this medication should be avoided or used with caution.
Do not use (1)
Known allergy to this medication or its components
Use caution (1)
Consult healthcare provider for benefits vs risks assessment
Official drug label
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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy