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Alginic Acid



Alginic acid is used in combination with antacids (such as aluminum hydroxide, sodium /magnesium carbonates) in treatment of heartburn (including heartburn in pregnancy), gastric reflux (regurgitation)/reflux esophagitis (inflammation of food pipe caused by flow back of digestive acids produced in stomach), and acid indigestion.

How it works

Alginic acid (also known as polymannuronic acid) is a natural carbohydrate obtained from brown algae (species of seaweed). It belongs to the physical barrier group of medicines. Alginic acid forms foam like coating on esophagus and gastric contents. It thus, protects the food pipe from gastric acids in case there is a backward flow by neutralizing the acids, and thereby preventing inflammation or ulceration of esophagus.

Common side effects



No medicine available

Expert advice

  • It is recommended to take alginic acid after meals and at least 30 minutes before bedtime.
  • Inform your doctor if you are suffering from kidney disease, diabetes, constipation or dehydration.
  • Taking antacids at the same time with other medicines interferes with the drugs effect and hence you may need special instructions about usage of these medicines.
  • Tell your doctor if you are or are planning to become pregnant or are breast-feeding.
  • If your symptoms do not improve within 2 weeks or if they get worse, or if you experience black, tarry stools or vomit, check with your doctor.
  • Seek immediate medical attention if any of these severe side effects occur: Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); loss of appetite; muscle weakness; nausea; slow reflexes; vomiting.

Frequently asked questions

Alginic Acid

Q. Is alginic acid gluten free?
Yes. Alginic acid is gluten free.
Q. Is alginic acid safe?
Alginic acid is safe if used at a dose and for duration prescribed by a doctor.

Content on this page was last updated on 30 September, 2016, by Dr. Varun Gupta (MD Pharmacology)