Calcium Carbonate

Calcium Carbonate in Medications

Calcium Carbonate: A Common Pharmaceutical Ingredient

Calcium carbonate is used in medications as a filler and stabilizing agent.

It does not treat symptoms when used as an inactive ingredient, but it helps give tablets structure and consistency.

What Is Calcium Carbonate?

Calcium carbonate is a naturally occurring mineral compound. In pharmaceuticals, it is refined and used in precise amounts for manufacturing consistency.

Why Is Calcium Carbonate Used in Medications?

Calcium carbonate is used because it:

  • Adds bulk to tablets
  • Improves tablet hardness
  • Supports uniform dosing
  • Helps maintain product stability

Ingredient Names to Look For

Calcium carbonate may be listed as:

  • Calcium carbonate
  • CaCO₃
  • E170

Where Does Calcium Carbonate Appear?

It is commonly found in:

  • Tablets
  • Chewable medications
  • Combination products

How to Check a Medication’s Ingredient List

Ingredient lists can vary by manufacturer and formulation.

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.

Educational Note

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