A panic exit door lock includes an inner cylinder seat. A shield is formed on the inner cylinder seat and includes a window. A driving block is pivotably connected to an actuating block operably connected to an outer lock core. The driving block includes a sleeve portion mounted around the actuating block. A flange is formed on the sleeve portion and is operably connected to a limiting member. An indicator member is pivotably connected to the inner cylinder seat and includes an indicator having a first portion indicating the limiting member is in a release position in which rotation of a handle retracts a latch and a second portion indicating the limiting member is in a blocking position in which the handle can not be rotated to retract the latch. One of the first and second portions is aligned with the window to indicate the position of the limiting member.