Sodium Alginate

Sodium Alginate in Medications

Sodium Alginate: A Common Pharmaceutical Ingredient
Sodium alginate is used in medications as a gelling and stabilizing agent. It does not treat medical conditions, but it plays an important role in viscosity and release control.

What Is Sodium Alginate?

Sodium alginate is a natural polysaccharide from brown seaweed. In pharmaceuticals, it forms gels with ions. It may appear under several ingredient names on medication labels.

Why Is Sodium Alginate Used in Medications?

Sodium alginate is used because it:

  • Forms gels for sustained release
  • Thickens liquids and suspensions
  • Stabilizes formulations
  • Supports raft-forming systems

These properties make it useful in both prescription and over-the-counter products.

Ingredient Names to Look For

Sodium alginate may be listed as:

  • Sodium alginate
  • Alginic acid sodium salt
  • E401

Where Does Sodium Alginate Appear?

It is commonly found in:

  • Sustained-release tablets
  • Liquid and gel formulations
  • Antacid products
  • Combination products

How to Check a Medication’s Ingredient List

Ingredient lists can vary by manufacturer and dosage form.
Use PillParser to scan a medication and view its ingredient list.





Adding the manufacturer filters generics (fillers/dyes often differ).

To keep PillParser free, anonymous scans are limited.


Understanding ingredient differences is especially important for individuals with known sensitivities. RxAllergyScan.com allows users to compare medication ingredients against their personal allergen profile.

Educational Note

This page provides educational information only and does not make medical claims.