A tamperproof dosage form article comprising: a core, wherein the core comprises a first end and a second end； a first shell on at least a portion of the first end of the core； a second shell on at least a portion of the second end of the core； wherein the first and second shells comprise one or more locking protrusions extending along at least a portion of the circumference and inner surface of the shells, and the core comprises one or more locking recesses, and wherein at least a portion of the shells proximal to the locking protrusions is elastically deformable and arranged such that each one locking protrusion is snapped into each one of the locking recesses once inserted over a predetermined portion of the core to provide a locking force between the core and the shells.
