A microbicidal delivery system including: a microbicidal composition including a microbicidal compound including a dendrimer including one or more surface groups of formula (IV)； a microbicidally active derivative thereof, or pharmaceutically acceptable salt or solvate thereof； and a carrier, excipient or diluent therefor； and a prophylactic device； the microbicidal composition being carried on a surface of the prophylactic device and being compatible therewith.
