An injection pen (1) includes a housing (2), a lead screw (75), a dose set member (6), a setback member (17), and a rotatable driver (60). The lead screw (75) is axially moveable in the housing (2). The dose set member (6) is connected to the housing (2) for dose setting and dose correcting. The setback member (17) is operatively connected to the dose set member (6). The rotatable driver (60) is operatively connected to the setback member (17) and the lead screw (75). The driver (60) is prevented from rotating during dose setting and dose correcting, and the driver (60) rotates during an injection to axially move the lead screw (75).
