bioabsorbable modular drug delivery devices having shapes and sizes adapted to be inserted within a mating receptacle on the surface of an implantable prosthesis are disclosed . the devices may be attached to one another to create custom drug delivery devices having controllable drug release characteristics that depend on the composition of individual modules comprising the device . the modules may be cylinders , disks , tiles or tubes comprised of a bioabsorbable polymer and a therapeutic agent . the therapeutic agent may be homogeneously distributed throughout the polymeric body of the device or contained within a cavity within a module comprising the device , or both . the device may be threaded or attached to a prosthesis by a biodegradable adhesive . the modular devices may also be formed into tapered plugs for insertion into a mating receptacle . in another embodiment , the drug delivery device may be inserted within a mesh bag that may be attached to a soft tissue as , for example , by sutures , for localized controlled dispensation of a therapeutic agent .