A device to be used with a medical administration device includes administration driver for administrating a prescribed dose of medicament; and a mechanical dose setter for setting a prescribed dose of medicament to be administered, including a mechanical indicating member fixedly connected to the administration driver for indicating the prescribed set dose. The device includes a mechanical dose information device for registering the prescribed dose of medicament to be administered including a mechanical information member adjustable to display that the prescribed dose to be administered is correct and inter-connected to said mechanical indicating member such that when the prescribed dose is set, this is indicated positively by indications on the mechanical information member.