The anti-opening dosage form article includes a core having a first end and a second end, a first shell on at least a portion of the first end of the core, and a second on at least a portion of the second end of the core. And the first shell and the second shell include one or more fixing protrusions extending along at least a part of the circumference and the inner surface of the shell, and the core includes one or more fixing recesses and is fixed. At least a portion of the shell proximate to the protrusion is elastically deformable, and each one of the fixed protrusions is inserted into a predetermined portion of the core once in each of the fixed recesses. It is snap-fitted and positioned to provide a locking force between the core and the shell.開封防止剤形物品は、第１端部及び第２端部を備えるコアと、コアの第１端部の少なくとも一部分上の第１シェルと、コアの第２端部の少なくとも一部分上の第２シェルと、を備え、第１シェル及び第２シェルは、シェルの周径及び内面の少なくとも一部分に沿って延びる１つ以上の固定突起部を備え、コアは１つ以上の固定凹部を備え、固定突起部に近接したシェルの少なくとも一部分は弾性的に変形可能であり、固定突起部のそれぞれ１つずつは、コアの所定の部分の上に一旦挿入されると、固定凹部のそれぞれ１つずつにスナップ嵌めされて、コアとシェルとの間に固定力を与えるように配置される。
