Letrozole Letrozole 2.5 MGColor: Yellow Shape: Circle Pattern: Solid Imprint: N, The tablet is debossed with N on one side and L on the other side. 2.5 MGColor: Dark Yellow Shape: Circle Pattern: Solid Imprint: 511 2.5 MGColor: Dark Yellow Shape: Circle Pattern: Solid Imprint: TEVA Last Updated: 3/4/2018