A medication dosage unit packaging
system includes a tray for holding a blister containing a plurality of unit chambers. The blister is divided into a general access zone containing at least one general access unit chamber and a
restricted access zone containing at least one
restricted access unit chamber. The general access zone and the
restricted access zone are separated by a chamber-
free zone. A retaining cap holds the blister
package in the tray. The retaining cap and the tray have therebetween a guide post fitting into a guide slot in the chamber-
free zone in the blister. The guide post and the guide slot are positioned in the tray such that when a blister
package is held in the tray by the retaining cap, the blister is slidable between a first position in which only the general access zone of the blister is accessible, and a second position which both the general access zone and the
limited access zone of the blister are accessible. A child-resistant hinging cap is hingeably mounted into the tray, such that when the hinging cap is in a closed position, it locks the blister
package in its first position, and when the hinging cap is in an opened position, it allows the blister package to be slid into its second position.