Abstract: Comprises a dispersion of nanocorpuscles in an aqueous solution as a dispersant and a pharmaceutically acceptable alcohol as co-dispersant or cosolvent, said nanocorpuscles having at least one lipid bilayer comprising at least one biliar salt and at least one phospholipid with the general formula (I), in which R1 and R2 are the same as each other or different, being generally linear aliphatic residues with 12-22 carbon atoms, having up to 4 double cis bonds, preferably up to 3 double cis bonds; these nanocorpuscles having an average diameter lower than 500 nm; and including metallothioneine in their interior.