Prescribing for comorbid disease in a palliative population: focus on the use of lipid-lowering medications.

BACKGROUND

The balance of benefit versus burden of ongoing treatments for comorbid disease in palliative populations as death approaches needs careful consideration given their particular susceptibility to adverse drug effects.

AIM

To provide descriptive data regarding the medications being prescribed to patients who have a life-limiting illness at the time of referral to a palliative care service in regional Australia, with particular focus on lipid-lowering medications.

METHODS

A prospective case note review of 203 patients reporting the number of medications prescribed and, for lipid-lowering medications, the indication and level of prevention sought (primary, secondary, tertiary). Rates were compared by performance status, disease phase and comorbidity burden.

RESULTS

Mean number of regular medications prescribed was 7.2, with higher rates observed in those patients with a non-malignant primary diagnosis (rate ratio 1.28, confidence interval (CI) 1.11-1.50) or poorer performance status (rate ratio 1.37, CI 1.11-1.69) and lower rates for those in the terminal phase of disease (rate ratio 0.48, CI 0.30-0.76). Over one fifth of patients were prescribed a lipid-lowering medication, and two fifths of these prescriptions were for primary prevention of cardiovascular disease. Patients in the highest quartile of Charlson Comorbidity Index score were 4.6 (CI 2.06-10.09) times more likely to be prescribed a lipid-lowering medication than those in the lowest quartile.

CONCLUSIONS

Polypharmacy is prevalent for this group of patients, placing them at high risk of drug-drug and drug-host interactions. Prescribing may be driven by risk factors and disease guidelines rather than a rational, patient-centred approach.