Electret sustained-release transdermal drug delivery system

The utility model relates to the technical field of medicines and in particular relates to a drug delivery system. The electret sustained-release transdermal drug delivery system comprises a backing layer and a drug-containing pressure sensitive adhesive layer, wherein the drug-containing pressure sensitive adhesive layer is arranged at the inner side of the backing layer; an electret layer is arranged at the outer side of the backing layer; a sustained-released film layer is arranged at the inner side of the drug-containing pressure sensitive adhesive layer; and a depot patch is formed by the electret layer, the backing layer, the drug-containing pressure sensitive adhesive layer and the sustained-released film layer. By adopting the technical scheme, the electret sustained-release transdermal drug delivery system has a sustained-release function to the release of the medicines and can be used for stabilizing the blood concentration and reducing such side effects as gastrointestinal tract toxicity and the like caused by oral medication. Besides, the electret sustained-release transdermal drug delivery system has the advantages of being convenient to deliver drugs, and the like.