Nanoparticles comprising a cyclodextrin and a biologically active molecule and uses thereof

The nanoparticles comprise a biodegradable polymer, a cyclodextrin or a derivative thereof and a biologically active molecule. Said nanoparticles can associate high quantities of biologically active molecules, in particular, hydrophobic molecules, and release the biologically active molecule by providing sustained and constant plasmatic levels thereof when administered orally or through any othermucosa of the organism.