A drive assembly (1) for a medication delivery device (9) is provided, comprising a piston rod (3) which is movable from a start position to an end position for medication delivery and resettable from the end position to the start position. The drive assembly further comprises an impeding element (2) for impeding a movement of the piston rod (3) from the end position to the start position during a reset of the piston rod, wherein the impeding element (2) comprises at least one resilient element (6). Furthermore, a medication delivery device (9) comprising the drive assembly (1) is disclosed.本發明提供一種用於藥物傳輸裝置(9)之驅動組件(1),其包含一活塞桿(3),其可從一起始位置移動至一結束位置以供藥物傳輸用,且可從結束位置復位至起始位置。驅動組件更包含一阻礙元件(2),用於在活塞桿之一復位期間阻礙活塞桿(3)從結束位置至起始位置之一移動,其中阻礙元件(2)包含至少一彈性元件(6)。再者,揭露一種包含驅動組件(1)之藥物傳輸裝置(9)。1‧‧‧驅動組件2‧‧‧阻礙元件3‧‧‧活塞桿4‧‧‧開口6‧‧‧彈性元件7‧‧‧劑量限制構件8‧‧‧驅動組件之構件17‧‧‧遠端方向18‧‧‧近端方向19‧‧‧彈性元件之(第一)端20‧‧‧彈性元件之(第二)端29‧‧‧藥物傳輸裝置之縱軸線
