Zero-order prolonged release coaxial implants
First Claim
1. A polymeric implant comprising a narcotic analgesic or a narcotic antagonist and a rate-controlling membrane, wherein the membrane is porous and has a pore volume ranging from about 5% to about 70%, wherein the implant comprises a rod, wherein the implant is a coaxial implant comprising a core containing the analgesic or antagonist and the rate controlling membrane, and wherein the analgesic or antagonist is released over a period of at least thirty days with zero order or near zero order release kinetics.
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Accused Products
Abstract
A coaxial implant has been developed using biodegradable polymeric materials. The coaxial implant has a core containing drug, surrounded by a semi-permeable membrane that controls the rate of release of material from the core. The core containing the drug and the polymer membrane(s) can be the same or different polymer. The core acts as a reservoir of drug, which partitions from the core polymer to form a saturated solution of drug at the polymer membrane.
136 Citations
17 Claims
- 1. A polymeric implant comprising a narcotic analgesic or a narcotic antagonist and a rate-controlling membrane, wherein the membrane is porous and has a pore volume ranging from about 5% to about 70%, wherein the implant comprises a rod, wherein the implant is a coaxial implant comprising a core containing the analgesic or antagonist and the rate controlling membrane, and wherein the analgesic or antagonist is released over a period of at least thirty days with zero order or near zero order release kinetics.
Specification