A medication dispensing unit comprising a carousel defining a plurality of compartments, each of the compartments adapted to store a
dose of medication is disclosed. The dispensing unit also comprises a housing that has a surface adapted to receive the carousel. The housing defines a receptacle and an access aperture that communicates between the receptacle and the surface that is adapted to receive the carousel. One of the compartments is positioned to communicate with the receptacle through the access aperture. The unit also comprises a dosing drawer that is positioned within the receptacle and communicates with the access aperture to receive a
dose of medication from the compartment through the access aperture. The dosing drawer includes a normally closed
trap door that, when opened, allows a
dose of medication in the drawer to
drop out of the dosing drawer. The dispensing unit comprises a
recovery drawer that is positioned within the receptacle and communicates with the dosing drawer through the
trap door, and receives a dose of medication from the dosing drawer when the
trap door is opened. The medication dispensing unit also comprises means for rotating the carousel and a
microcontroller that defines dosing period, determines that the patient has accessed the dosing drawer within a dosing period, and locks the
recovery drawer.