A dispenser cap closure device (100) configured to close one end of a dispenser cap (71) of a drug dispenser, the cap closure device (100) comprising: an upper cap closure portion (101 ) configured to engage an upper open end (74) of the dispenser cap (71) to close said open end of the dispenser cap (71)； a bottom cap closure portion (102) configured to mate with an upper open end engageable portion (74) of the dispenser cap (71) to secure the cap closure device (100) to the dispenser cap (71 )； and a bistable part (110), (111), (112), (113) connecting the upper cover closure part (101) and the lower cover closure part (102), the bistable part (110) being able , (111), (112), (113) to switch between a first stable form in which the flip-flop portion (110), (111), (112), (113) is extended, and a second stable form in which the bistable part (110), (111), (112), (113) is folded, wherein, when in the second stable form, the upper cover closure part (101) and the lower cover closure part (102) approach each other, and wherein the lower cap closure portion (102) comprises a plurality of radially outwardly extending projections (103) having an upper surface configured to engage the engageable portion of the cap of dispenser (71), and wherein a lower surface of the lower lid closure portion (102) is configured to engage a surface of a drug container of the dispenser sador.Un dispositivo de cierre de tapa de dispensador (100) configurado para cerrar un extremo de una tapa de dispensador (71) de un dispensador de medicamentos, comprendiendo el dispositivo de cierre de tapa (100): una parte de cierre de tapa superior (101) configurada para acoplarse con un extremo abierto superior (74) de la tapa de dispensador (71) para cerrar dicho extremo abierto de la tapa de dispensador (71)； una parte de cierre de tapa inferior (102) configurada para acoplarse con una parte acoplable del extremo abierto superior (74) de la tapa de dispensador (71) para fijar el dispositivo de cierre de
