there is disclosed a novel sandwich blister package for tablets and similar articles which generally comprises a plastic film having a plurality of heat - formed cavities which contain tablets or similar articles ; and , a plastic film / aluminum foil laminate sheet superimposed upon and heat sealed to the plastic film to form a blister card of pre - set size , each blister card being bonded to another blister card so that the aluminum foil forms the outer protective cover with the plastic film sandwiched between them .