The invention is directed to an analgesia and/or an anesthesia drug/device system and an analgesic and/or an anesthetic method utilizing a drug storage bag prefilled pharmaceutically or in a pharmaceutical compounding facility with a drug which system or method involves long-term stability of the drug prefilled storage bag, thus enabling the simplification of both, home treatment and hospital treatment procedures. In particular, the system or method is utilizing a storage bag comprising multi-layered film, the surface of which is drug-compatible while subsequent layers constitute a barrier against any gases, e.g, oxygen, carbon dioxide, water vapour and/or humidity, and optionally ultraviolet radiation. This system and method comprises preferably a label/marking, providing information in a visual and/or wireless way to the pump system and the supporting services, directly or through the internet, in order to avoid medical errors regarding the administration of analgesic and/or anesthetics drugs. The system and method also enables for the unlocking of any drug prefilled storage bag, preferably a drug cassette, which is protected against abuse.
