switch or contact 18 is situated in the shifting path of the advancing element 6 it serves to re set the counter 5 to zero during a deliver process the counter 5 can be an electrical or mechanical counter the use of the device of the present invention or course of an administering process will now be described starting from the starting position of the device in accordance with fig1 and 2 as many dosing bodies 10 as are required for the desired dosage are each individually moved by the dosing element 11 from the stockpile into the dosing position between the piston 19 and the advancing element 6 fig3 shows the device at the end of the dosing process for an examplary dosage a number of dosing bodies 10 in the dosing position are guided by the casing perpendicular to the advancing direction in alignment with the ampoule 3 and fixed in or counter to the advancing direction by the clamp 8 if the advancing element 6 is shifted in the advancing direction it presses the dosing bodies 10 out of the dosing position into the ampoule 3 and thus slides the piston 19 in the advancing direction towards the outlet 21 of the reservoir 3 such that the product dosage set is forced out of the reservoir 3 fig5 shows the device in its delivery position after delivery is complete before it automatically restores itself to the starting position dosed administering is complete and another administering can be started when the advancing element 6 has been slid into its starting position by the force of the spring 7 in the foregoing description embodiments of the invention including preferred embodiments.