The present invention provides a method for safely infusing a toxic fluid into a patient comprising the steps of drawing toxic fluid from a toxic fluid container into a withdrawing syringe, disconnecting a safety set from the toxic fluid container at a junction of a first male locking connector and ar interlocking slide, pushing the interlocking slide into a needle shroud assembly such that a sharpened distal tip of the needle is positioned within a resilient septum carried by the interlocking slide, connecting a second male locking connector to the interlocking slide, connecting the second male locking connector to a connect set, dispensing the toxic fluid from the syringe into the infusion bag, withdrawing the needle to position its sharpened distal tip within the resilient septum, attaching the connect set to the cyto admin set and infusing the toxic fluid into the patient.