The document summarizes a review of evidence on whether computerized provider order entry (CPOE) systems are effective in reducing prescribing errors. The review found the quality of evidence was moderate to poor, with high variability making it difficult to draw conclusions. Most studies found CPOE reduced prescribing error rates, but it remains unclear which specific errors were reduced and how much potential patient harm was decreased. More research is needed to determine CPOE's efficacy in reducing prescribing errors.