A therapeutic agent eluting element includes an elongate body member and one or more therapeutic agents elutable from the body member. The elongate body member is configured to be implanted subcutaneously along side of a therapy delivery element. The elongate body member may be formed from a polymeric material, and the agent eluting element may consist essentially of the body member and the one or more therapeutic agents. The therapeutic agent eluting element may be a part of a system or kit that includes a therapy delivery element and a tunneling tool, such as a dilator, sheath, catheter passer, or the like.