Patent ID: 7264822

Claim:
A system for treating a vascular condition, comprising: a catheter; a stent coupled to the catheter; and a polymeric coating on the stent comprising a polymer mixed with at least one conjugated drug, wherein each conjugated drug includes a control agent and a bioactive agent, wherein the control agent controls an elution rate of the bioactive agent, wherein the conjugated drug comprises a pseudodimer of the bioactive agent, wherein the pseudodimer has a molecular weight of at least twice that of the bioactive agent, the pseudodimer comprising a first bioactive agent and a second bioactive agent connected by a pseudodimeric interlinking group and wherein the first bioactive agent is a first molecule of podophyllotoxin, the second bioactive agent is a second molecule of podophyllotoxin, and the pseudodimeric interlinking group comprises an oxalate bridge, wherein the control agent is chosen from a group consisting of an acid chloride, an acid anhydride of fatty acid and a long chain fatty acid having between 3 and 20 carbon atoms.