A cannula assembly (10) comprising a hub (76) and a cannula (12) mounted in the hub (76). The cannula defines an inner space (36). The cannula comprises a distal end (16) and a proximal end (18). A first medicament (40) is provided in the inner space of the cannula. In one arrangement, the hub of the cannula assembly is configured to be coupled to an injection device (26). The cannula assembly may be removably or permanently coupled to the injection device containing a second medicament (17).
