Needle-free apparatus for the administration of a pharmaceutical composition in human beings or animals through a skin surface, comprises a housing; an auxiliary substance (I) for producing a power required to force a pharmaceutical composition from a package into the human or animal body; an auxiliary substance (II) for transferring the known power in order to force the pharmaceutical composition from a package into the human or animal body; an auxiliary substance (III) for clearing the apparatus; and a pharmaceutical composition comprising at least an analgesic. ACTIVITY : Analgesic. MECHANISM OF ACTION : None given.