A drug delivery device configured to provide a dose of first medicament followed by a dose of second medicament is disclosed. The device includes a main exterior body and an interior body. The device further includes a dual-chamber reservoir with (i) a first chamber holding a first medicament and (ii) a second chamber holding a second medicament. The device also includes a needle and a plunger. After activation of the device, the plunger is configured to (i) move the dual-chamber reservoir a given distance in a distal direction with respect to the interior body so that a distal end of the needle extends out of the interior body and (ii) after moving the dual-chamber reservoir the given distance, move in the distal direction with respect to the dual-chamber reservoir so as to eject from the needle the first medicament followed by the second medicament.建構來提供第一藥物劑量隨後提供第二藥物劑量的藥品輸送裝置被揭示。該裝置包括主要外部本體及內部本體。該裝置另包括雙室容器，其具有（i）保持第一藥物之第一室及（ii）保持第二藥物的第二室。該裝置亦包括針及柱塞。在該裝置的啟動之後，該柱塞被建構來（i）在遠側方向中相對於該內部本體將該雙室容器運動一給定距離，以致該針的遠側端延伸出該內部本體，及（ii）在將該雙室容器運動該給定距離之後，在該遠側方向中相對於該雙室容器運動，以便由該針排出該第一藥物、隨後排出該第二藥物。
