A puncturing device (1600) for puncturing of a wall, in particular the wall of a capsule containing medication for inhalation. The puncturing device or assembly comprises one or more substantially longitudinal prongs (1620), each having a puncturing surface (1630) at its distal end as well as a primary cutting edge (1640) disposed on the periphery of the prong and terminating at the puncturing surface (1630). A substantially planar face (1650) is disposed on the periphery of each prong (1620) opposite of the primary cutting edge (1640).
