Coating formulations including polyphosphazene polyelectrolytes and biologically active agents and asperities coated with such formulations

摘要

A formulation for coating asperities, such as microprojections or microneedles, which comprises at least one polyphosphazene polyelectrolyte and at least one biologically active agent. Such formulation provides for improved loading and improved homogeneity of the at least one biologically active agent on the microprojections or microneedles.