Sodium Metabisulfite

Sodium Metabisulfite in Medications

Sodium Metabisulfite: A Common Pharmaceutical Ingredient
Sodium metabisulfite is used in medications as an antioxidant. It does not treat medical conditions, but it plays an important role in preventing oxidation.


What Is Sodium Metabisulfite?

Sodium metabisulfite is an inorganic salt that releases sulfur dioxide. In pharmaceuticals, it protects sensitive compounds. It may appear under several ingredient names on medication labels.


Why Is Sodium Metabisulfite Used in Medications?

Sodium metabisulfite is used because it:

  • Prevents oxidative degradation
  • Preserves color and potency
  • Acts as a preservative in some cases
  • Maintains formulation stability

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


Ingredient Names to Look For

Sodium metabisulfite may be listed as:

  • Sodium metabisulfite
  • Sodium pyrosulfite
  • E223

Where Does Sodium Metabisulfite Appear?

It is commonly found in:

  • Liquid injectables
  • Ophthalmic solutions
  • Epinephrine 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.