the invention relates to a child resistant carton package for a pharmaceutical or like dangerous product . the package comprises an outer sleeve , an insert that can be slidingly drawn out of the sleeve , the insert carrying the packaged product , and a locking mechanism between the sleeve and the insert . according to the invention at least the outer sleeve is made of board reinforced with polymer to increase its resistance to tearing . the board may have a reinforcing layer of a tough polymer such as polyester , preferably on both sides of the board . there may also be a coextruded outer heat seal layer of polyolefine . the cutting edges may be protected with a polymer shield against delamination of the board . the same extrusion coated board can be used also for the inner sleeve .