Nexium is esomeprazole magnesium, the S-enantiomer of omeprazole. The patent landscape for Nexium is broader than a single patent and includes multiple families around:
- Composition of matter: patents on esomeprazole and its magnesium salt (the core active material and salt form used in Nexium).
- Formulations and salts: patents on tablet/capsule forms, enteric coatings, and other salt forms.
- Processes: methods for making esomeprazole or its salts.
- Uses: patents covering treatment methods for acid-related disorders (GERD, ulcers, H. pylori regimens, etc.).
Key points to know:
- There are multiple patent families across different regions (US, Europe, Asia, etc.). Each family has its own expiry.
- In many major markets, the core composition-of-matter patents and many related patents have expired or are nearing expiry, and generic esomeprazole products have entered or are entering the market.
- Some regional patents (e.g., on specific formulations, processes, or method-of-use claims) may still be active in certain jurisdictions, though this is increasingly uncommon.
If you want precise, up-to-date patent numbers and expiry dates for a specific country or region, I can look them up. Please tell me:
- The jurisdiction(s) you care about (e.g., US, EU/UK, Japan, India, etc.)
- Whether you want a summary of active patents only or a full list of major families (composition, formulation, process, use)
Note: I can provide a non-legal overview, but for definitive rights status, consult a patent attorney or the official patent office databases (USPTO Patents, Espacenet, WIPO PATENTSCOPE).