Biocompatible and biodegradable nanoparticles for the uptake and delivery of protein drugs.

Polymer blend obtainable by a process including the mixing phases: - A biocompatible polymer capable of forming nanoparticles and - an interaction agent biocompatible TO ACHIEVE THE COMBINATION POLYMER SUSCEPTIBLE TO BE MANAGED WITH MEDICATION whose agent interacting IS ABLE TO PRESERVE THE drug activity MANAGE AND TO WHICH THE AGENT IS ABLE TO INSPECT interacting DISTRIBUTION drug to be administered.