An injection pen, comprising a housing, a lead screw axially moveable in the housing, a dose set member for dose setting and dose correcting, threadably connected to the housing and having a first mating feature, a setback member having a second mating feature for engaging the first mating feature, a clicker that generates an audible or tactile indication during operation, the clicker being operatively connected to the dose set member, and a push button operatively connected to the setback member to cause the second mating feature to engage the first mating feature during an injection, the push button receiving the clicker, wherein the first mating feature is disengaged from the second mating feature during dose setting and dose correcting and engaged with the second mating feature during an injection.
