Can you name the year of keytruda's maiden fda nod?

What year did Keytruda get its first FDA approval?

Pembrolizumab (Keytruda) received its first FDA approval in 2014. [1]

When did Keytruda’s FDA approvals start, and what was the initial indication?

The initial FDA approval for pembrolizumab was tied to treatment of certain cancers, marking the start of Keytruda’s FDA approval timeline in 2014. [1]

Sources:
[1] https://www.drugpatentwatch.com/patent/Keytruda/US-9758418