When did keytruda come out?

When did Keytruda (pembrolizumab) first get approved?

Keytruda (pembrolizumab) came out in the sense of receiving its first FDA approval in September 2014 for the treatment of advanced melanoma. [1]

When did it start being used more broadly?

After its initial approval in 2014, Keytruda’s use expanded as the FDA approved additional indications over subsequent years (for example, in other cancers and settings), but those later approvals came after the drug’s initial 2014 launch.

What if you meant “first launch” vs “first FDA approval”?

Most people asking when Keytruda “came out” mean its first FDA approval, which was September 2014. If you meant a different market (like EU/UK) or the first time it was marketed in a specific country, the dates can differ.

Source

[1] DrugPatentWatch.com – Keytruda (pembrolizumab) history/coverage