A retrospective study comparing interventions by oncology and non-oncology pharmacists in outpatient chemotherapy.

Background: The differences in the clinical pharmacy services (CPS) provided by oncology and non-oncology pharmacists have not been sufficiently explained.

Aim: This study aimed to demonstrate the differences in direct CPS provided by oncology and non-oncology pharmacists for patients and physicians, and to assess the potential impact of these services on medical costs.

Methods: We retrospectively examined CPS provided by oncology and non-oncology pharmacists for outpatients who underwent chemotherapy between January and December 2016.