Preliminary guidelines for the detection and management of drug-related problems in cancer patients with type 2 diabetes mellitus: a practical resource for oncology pharmacists.

PURPOSE

The prevalence of type 2 diabetes mellitus (T2DM) in cancer patients is high. During the medication review process, clinical pharmacists could detect and manage drug-related problems (DRP) to optimize pharmacotherapy but there is a need to standardize pharmacists' interventions (PI) especially for T2DM-related DRP. The present study aims to describe DRP in cancer patients with T2DM undergoing anticancer treatment (AT) and to propose related preliminary guidelines to manage T2DM-related DRP.

METHODS

The study was conducted in one oncology outpatient hospital where a clinical pharmacy team performs medication reviews to detect and manage DRP by performing PI in cancer patients undergoing AT. All the data from November 23rd, 2015 to November 23rd, 2019 were extracted and demographic, clinical, oncological, and biological data were collected and analyzed. Based on these results and a literature review, a working group (2 pharmacists and one diabetologist) was constituted to propose a first set of preliminary guidelines clinical pharmacists that were then reviewed using the Delphi method by an expert panel of oncologists and pharmacists.

RESULTS

A total of 161 T2DM cancer patients were included in the study (19.7% of all cancer patients screened). Overall, 152 DRP (mean 1.67/patient) were detected (49.3% drug interaction) and 152 PI were performed by clinical pharmacists, mainly drug monitoring (48.0) and drug discontinuation (25.7%). Specifically, there was 24 T2DM-related DRP (including 29.2% drug interactions). Twenty-four DRPs were directly related to T2DM status. The five proposed guidelines reached a consensus after revisions and a sixth has been added.

CONCLUSION

DRPs were frequent among cancer patients with T2DM and we hypothesize that the preliminary guidelines should improve the detection of DRPs directly related to T2DM. The implementation of the preliminary guidelines should now be assessed in clinical practice.