Prednisone patent expiration date?

There isn’t a single “prednisone patent expiration date.” Patents cover different things (the chemical molecule, specific salt formulations, delivery methods, or uses), and expiration depends on country and the exact patent family. In addition, regulatory data exclusivity can affect market protection even after patents expire.

What you might want to clarify:
- Do you mean the original chemical patent for prednisone (the active molecule) or a specific prednisone product/formulation?
- Which country or region are you interested in?
- Are you looking for expiration dates for a particular patent number or for a brand-name product?

Helpful general points:
- The core prednisone molecule patent (the basic active ingredient) is widely expired in most major markets, and prednisone is broadly available as a generic.
- There may still be active patents on specific formulations (e.g., controlled-release tablets), combination products, or new uses, and those can extend protection.
- Even after patent expiry, some products may have regulatory exclusivities that delay generic entry in certain markets.

How to look it up quickly:
- Google Patents or Espacenet: search for “prednisone” and filter by country; check the “Expiration” or “Term” fields in each patent entry.
- USPTO Patent Center (for US patents) or the equivalent national patent office database.
- FDA Orange Book (for US-approved drug products): lists patents and exclusivity for each product.
- If you provide a country and whether you want the patent on the molecule or a specific product, I can guide you to the most relevant patent families and give more precise guidance.