A package for a medicament, the package comprising a sleeve and a slide, the slide having a medicament region for containing medicament, the sleeve having opposed first and second major surfaces connected and spaced apart by a side wall to define an internal volume, the side wall further defining a slide opening, the slide being movable parallel to a slide axis between a position in which the medicament region is substantially within the internal volume and a position in which at least some of the medicament region extends outside the internal volume through the slide opening, characterised in that the sleeve includes a shoulder and the package includes biasing means, the sleeve and slide being arranged such that the slide is movable within the internal volume between a secured position, in which slide is substantially prevented from moving parallel to the slide axis by contact between a portion of the slide and the shoulder, and an unsecured position, in which the slide portion can move parallel to the slide axis through the slide opening, the biasing means resiliently biasing the slide to the secured position. The invention extends to a blank for fabricating a sleeve for such a medicament package and to a slide or sleeve for use in such a medicament package.