A crucial safety system that should have been used to report the under-dosing of chemotherapy drugs at two Adelaide hospital is rarely used by medical staff, SA Health has found. The review into the Central Adelaide Local Health Network was commissioned to help improve patient care, learn from adverse incidents and reassure the community about safety. It found the Safety Learning System, which is used to log mistakes and near misses, has rarely been used but recent adverse events meant a “small number of specialties” were using it more.