Patent ID: 8287590

Claim:
A stent having a coating comprising: (a) a primer layer having a polymer composition of two or more polymers, and (b) a single outermost drug reservoir layer having a polymer composition comprising a polymeric alloy mixture of two or more polymers, the primer layer polymer composition being distinct from the drug reservoir layer polymer composition, the drug reservoir layer further comprising one or more active agents, the coating having sufficient adhesion and flexibility to remain intact upon stent expansion and during a sustained period thereafter, and releasing efficacious amounts of the active agent at the site of stent expansion; wherein the primer layer comprises one or more polymers selected from the group consisting of acrylate polymer/copolymer, acrylate carboxyl or hydroxyl copolymer, olefin acrylic acid copolymer, ethylene acrylic acid copolymer, a polyamide polymer/copolymer, a polyimide polymer/copolymer, polyvinylpyrrolidone/vinyl acetate copolymer (PVP/VA), polyethylene glycol, polyethylene oxide, ethylene vinylacetate copolymer, epoxy polymer, polyurethane, polycarbonate urethane, silicone urethane, a polyvinylpyridine polymer, a polyvinylpyridine copolymer, and polyether sulfones.