An improved simple, efficient, safe, economical, and fast transmembrane ling procedure for efficient active loading of weak amphiphatic drugs into liposomes using the transmembrane gradient. The resulting liposomes loaded with the amphiphatic drug are stable and safe. A storagable form of loadable liposomes...http://www.google.de/patents/US5316771?utm_source=gb-gplus-sharePatent US5316771 - Method of amphiphatic drug loading in liposomes by ammonium ion gradient
