An implantable lead comprising: a flexible body extending between a proximal end and a distal end; a connector assembly secured to the proximal end for coupling the lead to an implantable medical device, the connector assembly including a terminal pin rotatable relative to the body; a conductor member disposed longitudinally within the body and coupled to the terminal pin, the conductor member rotatable relative to the body; and a distal assembly coupled to the distal end of the body and including: a housing having a distal region and a proximal region, the proximal region fixedly coupled to the distal end of the body, the housing formed from a polymeric material; a radiopaque agent dispersed within the polymeric material forming the housing; an elutable drug component dispersed within the polymeric material forming the housing; a coupler rotatably disposed within the housing, the coupler having a proximal end and a distal end, the proximal end connected to the conductor member; and a helical electrode fixedly secured to the coupler; wherein the terminal pin is rotatably engaged with the coupler via the conductor member such that rotation of the terminal pin causes the coupler and the helical electrode to rotate and therefore translate relative to the housing, wherein the housing comprises an at least substantially homogenous mixture of radiopaque agent, elutable drug component and polyetheretherketone. a flexible body extending between a proximal end and a distal end; a connector assembly secured to the proximal end for coupling the lead to an implantable medical device, the connector assembly including a terminal pin rotatable relative to the body; a conductor member disposed longitudinally within the body and coupled to the terminal pin, the conductor member rotatable relative to the body; and a distal assembly coupled to the distal end of the body and including: a housing having a distal region and a proximal region, the proximal region fixedly coupled to the distal end of the body, the housing formed from a polymeric material; a radiopaque agent dispersed within the polymeric material forming the housing; an elutable drug component dispersed within the polymeric material forming the housing; a coupler rotatably disposed within the housing, the coupler having a proximal end and a distal end, the proximal end connected to the conductor member; and a helical electrode fixedly secured to the coupler; a housing having a distal region and a proximal region, the proximal region fixedly coupled to the distal end of the body, the housing formed from a polymeric material; a radiopaque agent dispersed within the polymeric material forming the housing; an elutable drug component dispersed within the polymeric material forming the housing; a coupler rotatably disposed within the housing, the coupler having a proximal end and a distal end, the proximal end connected to the conductor member; and a helical electrode fixedly secured to the coupler; wherein the terminal pin is rotatably engaged with the coupler via the conductor member such that rotation of the terminal pin causes the coupler and the helical electrode to rotate and therefore translate relative to the housing, wherein the housing comprises an at least substantially homogenous mixture of radiopaque agent, elutable drug component and polyetheretherketone.