| abstract |
A pharmaceutical delivery device, comprising a cylindrical body formed from a plurality of concentrically arranged layers, each layer being formed from a biodegradable material and incorporating at least one active pharmaceutical agent. Preferably the device comprises an outer layer, and inner layer and one or more intermediate layers, wherein at least one of said one or more intermediate layers is formed from a material having a greater rate of degradation that the inner and outer layers such that the inner and outer layers separate in use. |