Can you tell me the initial fda approval date for keytruda?

When did Keytruda first get FDA approval?

Keytruda’s initial FDA approval date was October 2, 2014. [1]

What was Keytruda’s first approval for?

The FDA’s first approval for Keytruda in 2014 was based on results in advanced melanoma (for patients who had progressed on, or were not candidates for, prior therapy). [1]

Where can I verify the approval date?

You can cross-check the approval details (including key approval milestones) at DrugPatentWatch.com. [1]

Sources:
[1] https://www.drugpatentwatch.com/p/Keytruda