A disposable and protected blister pack constructed from three components and having information on it identifying a patient for whom the blister pack is intended, and prescribed medication contained in the blisters of the pack, the three components comprising: a first component in the form of a transparent blister sheet having manually depressible blisters providing cavities individually containing medication doses prescribed by a medical practitioner; a second component in the form of a frangible backing sheet sealing the cavities of the blisters and in adherent contact with the face of the blister sheet opposite that from which the blisters protrude, so as to seal the medication doses in each of the blister cavities; and a third component in the form of a protective card securely attached to the blister sheet to protect it from damage, printing on the card identifying the patient and the nature of the medication prescribed by the medical practitioner, the third component being attached to one marginal edge of the blister sheet and having fold lines, one fold line providing a hinge about which the pack can be turned to facilitate access to its upper and lower surfaces and thus the removal of medication doses from a selected blister of the pack, characterised in that three identical printed markings (17a, 17b, 17c) are respectively displayed on the same side of the blister pack when the third component is unfolded, one of the markings being printed on the third component, a second of the markings being printed on the second component, and the third marking being printed on an adhesive tab transferred from a first position on the second component to a predetermined second position on the first component enabling the marking to be viewed through a window provided in the second component. a first component in the form of a transparent blister sheet having manually depressible blisters providing cavities individually containing medication doses prescribed by a medical practitioner; a second component in the form of a frangible backing sheet sealing the cavities of the blisters and in adherent contact with the face of the blister sheet opposite that from which the blisters protrude, so as to seal the medication doses in each of the blister cavities; and a third component in the form of a protective card securely attached to the blister sheet to protect it from damage, printing on the card identifying the patient and the nature of the medication prescribed by the medical practitioner, the third component being attached to one marginal edge of the blister sheet and having fold lines, one fold line providing a hinge about which the pack can be turned to facilitate access to its upper and lower surfaces and thus the removal of medication doses from a selected blister of the pack, characterised in that three identical printed markings (17a, 17b, 17c) are respectively displayed on the same side of the blister pack when the third component is unfolded, one of the markings being printed on the third component, a second of the markings being printed on the second component, and the third marking being printed on an adhesive tab transferred from a first position on the second component to a predetermined second position on the first component enabling the marking to be viewed through a window provided in the second component.