Patent ID: 8088404

Claim:
A medical device comprising a controlled release coating comprising: a polymer component comprising a terpolymer-co-polymer-homopolymer polymer blend and a drug, wherein the δ T for the drug is within ±10 J 1/2 /cm 3/2 of the total solubility parameter δ T , for the polymer component; and wherein said terpolymer comprises monomer subunits consisting essentially of vinyl acetate (VAc), alkyl methacrylate (AMA) and n-vinyl pyrrolidone (NVP), said co-polymer comprises monomer subunits consisting essentially of VAc and AMA, and said homopolymer is polyvinyl pyrrolidone, wherein: the terpolymer has a Tg of 15° C. to 20° C.; the co-polymer has a Tg of 32° C. to 35° C.; the homopolymer has a Tg of 174° C.; and the polymer blend comprises 20-30% co-polymer, 60-70% terpolymer, and 5-15% homopolymer.