The present embodiments provide apparatus and methods suitable for deliveringa therapeutic agent to a target site.The apparatus (420) generally comprises at least one container (430) forholding a therapeutic agent (438), and a pressure source(50) for facilitating delivery of the therapeutic agent (438). In oneembodiment, the pressure source (50) may be placed in selectivefluid communication with a proximal region (434) of the container (430) andfluid from the pressure source (50) may flowthrough at least a portion of the container (430) to urge the therapeuticagent (438) through container (430) towards the target site.In an alternative embodiment, the container and the pressure source may becoupled to first and second inlet ports of a connectingmember, respectively, such that the therapeutic agent flows through an outletport of the connecting member and towards the target site.