A tamperproof dosage form for oral administration comprising: a caplet comprising first and second ends (3,4), a middle region extending between said first and second ends (3,4), parallel and oppositely disposed top and bottom faces (6,7), and a land interposed between said top and bottom faces (6,7) and extending along a perimeter of the caplet on a plane parallel to a caplet length axis; and first and second shells (9,10), each comprising an open end and a closed domeshaped end, each fitted over at least a portion of said caplet, said portion comprising at least said first and/or second ends (3,4) of the caplet and at least part of said middle region; characterized in that an adhesive substance is arranged between said caplet and said shells (9,10) at least over a portion of the top and/or bottom faces (6,7) proximal to the first and second ends (3,4) of the caplet and a corresponding portion of an inner surface of the closed dome-shaped end of said shells (9,10) to fixedly join said shells (9,10) to said caplet, wherein the caplet is free of one or more subcoatings such that caplet is directly in contact with the adhesive substance, and in that a gap is formed between the first and second shells (9,10) in a direction parallel to the caplet length axis such that at least a portion of the middle region of the caplet is exposed, and wherein the opening force to separate the capsule shells from the caplet is greater than 20N, wherein the torsion force to separate the capsule shells from the caplet is greater than 100Nmm, and wherein the adhesive substance comprises one or more adhesive enhancing agents selected from the group consisting of: chitosan, sucrose, fructose, lactose, maltose, cellobiose, glucose, galactose, mannose, arabinose, sorbitol, and mixtures thereof, wherein the adhesive substance is disposed over an adhesive area (Ar), said adhesive area (Ar) corresponding to an external surface of the caplet comprising at least a portion of the top and/or bottom faces (6,7) and a portion of the land proximal to the first and second ends (3,4) of the caplet, preferably wherein said adhesive area (Ar) is less than the total external surface area of the caplet. a caplet comprising first and second ends (3,4), a middle region extending between said first and second ends (3,4), parallel and oppositely disposed top and bottom faces (6,7), and a land interposed between said top and bottom faces (6,7) and extending along a perimeter of the caplet on a plane parallel to a caplet length axis; and first and second shells (9,10), each comprising an open end and a closed domeshaped end, each fitted over at least a portion of said caplet, said portion comprising at least said first and/or second ends (3,4) of the caplet and at least part of said middle region; characterized in that an adhesive substance is arranged between said caplet and said shells (9,10) at least over a portion of the top and/or bottom faces (6,7) proximal to the first and second ends (3,4) of the caplet and a corresponding portion of an inner surface of the closed dome-shaped end of said shells (9,10) to fixedly join said shells (9,10) to said caplet, wherein the caplet is free of one or more subcoatings such that caplet is directly in contact with the adhesive substance, and in that a gap is formed between the first and second shells (9,10) in a direction parallel to the caplet length axis such that at least a portion of the middle region of the caplet is exposed, and wherein the opening force to separate the capsule shells from the caplet is greater than 20N, wherein the torsion force to separate the capsule shells from the caplet is greater than 100Nmm, and wherein the adhesive substance comprises one or more adhesive enhancing agents selected from the group consisting of: chitosan, sucrose, fructose, lactose, maltose, cellobiose, glucose, galactose, mannose, arabinose, sorbitol, and mixtures thereof, wherein the adhesive substance is disposed over an adhesive area (Ar), said adhesive area (Ar) corresponding to an external surface of the caplet comprising at least a portion of the top and/or bottom faces (6,7) and a portion of the land proximal to the first and second ends (3,4) of the caplet, preferably wherein said adhesive area (Ar) is less than the total external surface area of the caplet.