I will start to work with LNC and need to use a cationic polymer, like Eudragit-RS100. But, we will spray drie these LNCs to pulmonary route. As we know, Eudragit RS-100 is not a good candidate because it is not biodegradable and can be stored at the pulmonary branches. Anyone know a polymer like EUDRAGIT - RS100, but biodegradable? Thanks in advance.