Phospholipid delivery nanosystems In recent years, phospholipid delivery nanosystems (PTNS) for drug delivery based on soybean phosphatidylcholine have been developed. PTNS are produced in the form of lyophilized powders, which are stable in time. The incorporation of some drugs into PTNS can greatly improve their bioavailability and therapeutic effect. PTNS contain soybean phosphatidylcholine (95-97% purity) and maltose, wherein the weight ratio of phosphatidylcholine to maltose is 1:4. After the lyophilized powder is diluted in water, PTNS nanoparticles are formed in the maltose solution.