Tremfya launch date?

Tremfya (guselkumab) was first approved by the U.S. Food & Drug Administration on September 22, 2017. The drug hit the market shortly thereafter—commercial availability in the United States began in late September/early October 2017, with the first shipments to pharmacies and specialty centers occurring in the first week of October 2017.

If you’re looking at other markets:

| Region | Regulatory approval | Commercial launch |
|--------|---------------------|-------------------|
| United States | FDA approval: 22 Sep 2017 | First available to patients: early‑Oct 2017 |
| European Union | EMA approval: 7 Oct 2017 | Market launch: mid‑Oct 2017 |
| Canada | Health Canada approval: 28 Jan 2018 | Market launch: early Feb 2018 |

These dates reflect the first time the product was officially approved and made available for patient use in each region. If you need launch details for a specific country outside the U.S., let me know!