Trazodone paten?

Do you mean the patent status of trazodone itself (the active antidepressant) or of a specific formulation like the extended‑release version Oleptro? And which country or region are you interested in? Patent status varies by jurisdiction.

What’s generally true:
- The basic chemical trazodone is a very old drug and is generally off-patent worldwide. Generic trazodone tablets are widely available.
- There have been specific patents related to formulations (for example, extended‑release versions) or particular uses. Many of these formulation/use patents would have expired or are nearing expiration in most markets, though some data exclusivity or last‑to‑market protections could apply in certain places.
- A notable newer product in the past decade is an extended‑release version (often marketed under a brand name like Oleptro). Patents around that particular formulation existed, but they’re typically separate from the original trazodone patents and may have expired or are expiring now.

If you want precise current status, I can help you look up:
- For the country you specify, search:
- USPTO PatFT and Patentscope (WIPO) for global patents
- Espacenet (European Patent Office) for Europe
- National patent databases for other regions
- Look for: “trazodone” and “trazodone hydrochloride” as well as formulation names like “extended‑release trazodone” or brand/formulation names (e.g., Oleptro).

Tell me:
- Which country or region you care about
- Whether you want the status of the basic trazodone active ingredient patents, or of a specific brand/formulation (e.g., Oleptro), or both

I can then outline the current status more precisely and point you to the relevant patent records.