Calcium Phosphate

Calcium Phosphate in Medications

Calcium Phosphate: A Common Pharmaceutical Ingredient
Calcium phosphate is used in medications as a filler and binder. It does not treat medical conditions, but it plays an important role in tablet formation and product consistency.

What Is Calcium Phosphate?

Calcium phosphate is an inorganic mineral salt, often in dibasic or tribasic forms. In pharmaceuticals, it is processed for compressibility and stability. It may appear under several ingredient names on medication labels.

Why Is Calcium Phosphate Used in Medications?

Calcium phosphate is used because it:

  • Acts as a diluent/filler to bulk tablets or capsules
  • Improves compressibility and tablet hardness
  • Enhances powder flow during manufacturing
  • Provides good stability with active ingredients

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

Ingredient Names to Look For

Calcium phosphate may be listed as:

  • Calcium phosphate
  • Dibasic calcium phosphate
  • Tricalcium phosphate

Where Does Calcium Phosphate Appear?

It is commonly found in:

  • Tablets
  • Capsules
  • Direct compression formulations
  • 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.