The invention concerns a complete injection device which is ready for immediate use and whose injection member charged with an active substance solution and cannula form an inseparable unit. The invention also concerns a blister pack comprising at least two units, of which the basic unit is a complete injection device ready for immediate use. The advantages of the injection device according to the invention are that it is a disposable syringe charged with active substance solution available for immediate use without the need of additional manipulation, remains sterile until the point immediately before use and is particularly suitable for small dosages.
