A detachable cap is disclosed for an inhaler apparatus having an inhaler housing and a canister configured to hold a first substance that is aerosolized on demand from the user. The apparatus canister is engaged with the inhaler housing to convey the aerosolized first substance into the users mouth via a mouthpiece. The detachable cap includes a cap body having a first end and a second end. The detachable cap also includes an actuation surface arranged at the first end, wherein the actuation surface is configured to be depressed by the user to actuate the canister and aerosolize the first substance. The detachable cap additionally includes a feature arranged at the second end and configured to be engaged with at least one of the inhaler housing and the canister to secure the detachable cap to the inhaler apparatus. An inhaler apparatus having such a detachable cap is also disclosed.
