A blister piercing element (8) for puncturing the Hd of a blister containing a dose of medicament for inhalation by a user is disclosed. The piercing element comprises an outlet opening (10) for the passage of medicament entrained in an airflow out of the blister and, a piercing head (11) extending beyond and overhanging the opening that cuts a flap in a lid of a blister and pushes it away from the opening during insertion.
