Abstract: This device includes a single enclosure (7) containing and carrying the reservoir (A), the dispenser (B), and the distributor (C) made of cylindrical and rotary brushes (39a to 39c), and the dispenser (B) having two parallel flaps (15, 16) which come into closure contact against the upstream transverse wall (12a) of the enclosure (7), near to the blister sheet (5), and are linked, by their posterior ends, to independent motors (18, 19) able to move the flaps in one direction or the reverse, the control of the opening and closing of each flap (15 and 16) reacting, in respect of the upper flap (15), to a volumetric sensor (34) detecting the quantity of tablets accumulated in the buffer bay (40) and, in respect of the lower flap, to a sensor (38) disposed above the blister sheet (5), upstream of the first brush (39a).