Embodiments of the present invention feature devices and methods for administering medicaments to subjects and, in particular, molecular iodine to animals in drinking water for the treatment of oral bad breath and disease. An exemplary device comprises a source of medicament in a fluid, measuring means, an administration switch and a water reservoir means. The measuring means is in fluid communication with said source of medicament for measuring an aliquot of medicament corresponding to a dose for the treatment of a disease. The measuring means is also in communication with a water reservoir means and releases the aliquot into the water reservoir means upon signal activation. The administration switch means is in signal communication with the measuring means and upon activation by a subject produces an activation signal received by the measuring means. The water reservoir means is for receiving the aliquot and forming an aqueous solution of medicament.
