An inventory control system, comprising a blister pack having a pierceable sheet that includes a plurality of printed circuits overlying each of the compartments of the blister pack. The printed circuits are in electrical communication with a connector assembly, the connector assembly being in electrical communication with a removable header. The header is in communication with a microprocessor controlled device having a memory; wherein the microprocessor controlled device determines the contents of the blister pack. The blister pack and connector assembly are removed from the substantially fixed header so the contents can be distributed. As the contents are distributed from the blister pack, the printed circuits are broken. When the connector assembly is reattached to the blister pack, electrical signals transmitted through the connector assembly and the blister pack determines the number of broken circuits, indicative of the contents of the blister pack. The connector assembly is a reusable device that includes a board that provides for electrical communication between the header and the blister pack and also facilitates assembly and removal of the connector to the header.