Abstract: A cap with a timing circuit carries a switch engaged by a pin whose position is representative of when the cap closes a receptacle.

Abstract: A cap is attachable to a receptacle for co-acting therewithin enclosing medication and timing a predetermined interval for taking the medication defined by one timing schedule of a set of selectable timing schedules. An electronic timing circuit in the cap is constructed and arranged to provide an alarm signal designating a time for taking the medication at the expiration of a predetermined time interval defined by the timing schedule. A battery furnishes power to the electronic timing circuit. A switch is connected between the battery and the electronic timing circuit having an initial ship position preventing the flow of electrical energy from the battery to the electronic timing circuit and an on position allowing delivery of electrical power from the battery to the electronic timing circuit. The switch is constructed and arranged to be initially in the ship position and switch to the on position when the cap is first attached to the receptacle to close the receptacle.