Character mistake: When talking about Mike and Ike giving them descriptions while on NZT, he mentions that he once heard Ike's name but forgot it. Completely impossible since his memory is impeccable on NZT.
Limitless (2015)
1 character mistake in Page 44 - chronological order
This Is Your Brian on Drugs - S1-E11
Factual error: After Agent Rooks has taken NZT he does Sudoku puzzles. When Brian is flipping through the puzzles, the first 2 pages seem OK, but after that, the rest of the puzzles are filled in wrong, not a mistake someone on NZT would do.
Brian Finch: I can be really annoying when I'm on NZT.
Agent Ike: We've noticed.