Figure 1

Number of preparation and inspection errors in three categories (A) and two groups (B). The total numbers of preparation and inspection errors involved in drug name errors were 704 and 73, respectively. Also, the numbers of preparation and inspection errors in three categories (similarity of drug efficacy, similarity of drug name, similarity of drug appearance) or two groups (drug efficacy similarity (+) group, drug efficacy similarity (−) group) were 600 and 66, respectively. The preparation and inspection errors were classified into seven error types (A) and two error groups (B). Numerical values in the circle represent the number of preparation errors (inspection errors).