This invention discloses an improved medical implant device for mammals wherein the use of biodegradable materials in the drug- containing matrix creates non-random biodegradable barriers and/or drug mini-chambers in the matrix channels which have the effect of reducing or regulating the initial drug "burst" and/or of "flattening"out or "adjusting" the drug delivery levels during a 3 or more day time period. Further discloses an anticoagulant materials are a feature of the implant device and are intended to regulate and/or maintain the flow of drug material delivery by reducing and/or eliminating clotting.
