Medication reconciliation: pharmacist showed no clear difference in readmission at 1 month ( compared with other professionals (moderate certainty).
Medication reconciliation: pharmacist may leads to higher discrepancy resolution ( compared with other professionals (low certainty).
Medication reconciliation by pharmacist: database‐assisted MR may leads to lower potential ADEs ( ≥ 1 per patient) ( compared with unassisted MR (low certainty).
Medication reconciliation by pharmacist: database‐assisted MR showed no clear difference in discrepancy resolution ( compared with unassisted MR (low certainty).
It is very uncertain whether medication reconciliation by trained pharmacist technician changes medication errors ( compared with pharmacist (very low certainty).
Medication reconciliation probably leads to lower ADEs ( compared with no medication reconciliation (moderate certainty).
It is very uncertain whether medication reconciliation: multimodal intervention changes medication error ( compared with usual care (very low certainty).
It is very uncertain whether medication reconciliation: multimodal intervention changes potential ADEs ( compared with usual care (very low certainty).
Medication reconciliation: multimodal intervention probably leads to higher discrepancy resolution ( compared with usual care (moderate certainty).
CPOE/CDSS showed no clear difference in medication errors ( compared with control/paper‐based (moderate certainty).
It is very uncertain whether CPOE/CDSS changes ADEs ( compared with control/paper‐based (very low certainty).
It is very uncertain whether CPOE/CDSS changes mortality during hospitalisation ( compared with control/paper‐based (very low certainty).
Improved CPOE/CDSS probably leads to lower medication errors ( compared with standard CPOE/CDSS (moderate certainty).