Total errors Lack of drug information Lapsus Lack of patient information Lack of technology management MP 352 136 213 3 0 EP1 45 7 5 3 30 EP2 25 4 4 0 17

Table 3: Medication errors by causes MP: phase 1 (manual prescription), prior to electronic prescription implementation EP1: phase 2 (electronic prescription), one month after electronic prescription implementation PE2: phase 3 (electronic prescription), two months after electronic prescription implementation.