Sodium Citrate

Sodium Citrate in Medications

Sodium Citrate: A Common Pharmaceutical Ingredient
Sodium citrate is used in medications as a buffering agent. It does not treat medical conditions, but it plays an important role in pH control and stability.

What Is Sodium Citrate?

Sodium citrate is the sodium salt of citric acid. In pharmaceuticals, it buffers solutions. It may appear under several ingredient names on medication labels.

Why Is Sodium Citrate Used in Medications?

Sodium citrate is used because it:

  • Maintains stable pH in liquids
  • Chelates metals to prevent issues
  • Adjusts tonicity
  • Improves solubility

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

Ingredient Names to Look For

Sodium citrate may be listed as:

  • Sodium citrate
  • Trisodium citrate
  • E331

Where Does Sodium Citrate Appear?

It is commonly found in:

  • Liquid orals and injectables
  • Effervescent tablets
  • Ophthalmic solutions
  • 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.