Comprehensive pharmacological geriatric assessment compared to usual care in an older adult with cancer in the absence of polypharmacy

Abstract

Introduction

Medication reconciliation as part of a Comprehensive Geriatric Assessment by a specialist pharmacist is a process that has been shown to be beneficial in terms of medication adherence in patients taking oral anticancer medication and potentially cost-effective in cancer patients. Medication review guidelines in older adults with cancer suggest using polypharmacy (≥ 5 medications) as an indication for medication review in older adults with cancer.

Case report

We present a case where a medication review as part of a Comprehensive Geriatric Assessment in the absence of polypharmacy resulted in two pharmacist interventions when standard care resulted in no intervention. A 71-year-old male prescribed capecitabine for rectal cancer had a medication reconciliation done as standard care before starting an oral anticancer medication. He then proceeded to get a medication review as part of a Comprehensive Geriatric Assessment and was deemed to have a potentially excessive anticholinergic burden and underprescribed gastro protection. This case is interesting as it occurred in a patient who would not have met the current inclusion criteria for a medication review as part of a Comprehensive Geriatric Assessment.

Management and outcome

As a result of the Comprehensive Geriatric Assessment, a letter was written to the patient's general practitioner, recommending a change to anti-depressant therapy to optimise anticholinergic burden, as well as introducing a proton-pump inhibitor upon completion of the Capecitabine protocol concurrent with radiotherapy, to confer gastro-protection against the antidepressant medication, as per the START criteria. Upon discharge from medical oncology, neither of the changes had been adopted by the patient's general practitioner. This highlights one of the challenges facing clinical pharmacists in an outpatient setting, where evidence-based recommendations are not always implemented as care transitions from tertiary to primary care.

Conclusion

Comprehensive Geriatric Assessment is a process that identifies potential issues in older adults with cancer that aren’t identified with standard medication review. This is also evident for medication reviews as part of a Comprehensive Geriatric Assessment, and where resources allow, and recommendations are likely to be accepted, it should be offered to all older adults with cancer. Pharmacists are still faced with challenges in implementing recommendations from medication reviews, particularly in healthcare systems where pharmacist prescribing has yet to be introduced.