Abstract: A visual indicator for a medication container signals to the user that a medication has previously been taken within a prescribed preceding time interval and should not be taken again. A substrate with a permissive symbol or indicator printed thereon is covered by a liquid crystal display which is comprised of a series of separately activatable display segments which, when activated, block visual observation of the permissive indicator. When the container is opened and closed, initially all such display segments are activated, thus blocking or obscuring the permissive indicator. As the prescribed time interval passes, the successive display segments are sequentially deactivated, and when the prescribed time interval has expired, all such display segments are deactivated so that the permissive indicator is fully exposed to observation.

Abstract: The invention provides a device that cautions the user of medication, for example, by visual change and/or surface contour change of a part of a medicine container, that a preset time since an event, such as since the last prior use or application of the medication, has not transpired. The medicine container cover or an indicating element of the container or cover changes visually or dimensionally to signal the user that it is not advisable to administer the next dose of the medication. The device shuts itself down upon changing to a permissive configuration, and requires no power input until it is again activated by accessing the container.