There is provided an injector device comprising a housing (26), a drug container (10) positioned in the housing a drug delivery mechanism associated with the drug container, the drug delivery mechanism comprising a stored energy source an activation member (18) coupled to the housing, the activation member configured to contact the injection site in use and movable relative to the housing to an activation position to activate the drug delivery mechanism and a removable cap (134) coupled to the activation member and to the housing, wherein in a first position a first portion of the housing engages the activation member to prevent the activation member from moving into the activation position, and wherein a portion of the cap engages the housing to retain the first portion of the housing in the first position such that the activation member is prevented from moving into the activation position until the cap is uncoupled from the activation member.
