A package for pharmaceutical products, in particular for parenteral products (prefilled syringes, flacons, ampoules, vials, bottles), comprises a supporting body forming at least one compartment for containing a parenteral product made from a single-sheet blank, preferably made of paper-based material, which has a base face, an upper face and a plurality of lateral faces which are connected to the base face and/or to the upper face, said upper face having at least one opening made in it and comprising at least one foldable portion defined by cutting lines of the upper face and/or by crease lines and delimiting a portion of the opening to form a cavity designed to receive the parenteral product, the supporting body being able to switch between a non-operating condition in which it has a planar profile which minimises its dimensions, and an operating condition in which: the supporting body is substantially box-shaped; the foldable portion is folded inside the supporting body so that together with the opening it forms the compartment for containing the parenteral product and allows the parenteral product to be removably constrained in the cavity in the containment compartment.