In elderly patients with mental disorders and polypharmacy, treatment is a challenge. Despite clear treatment guidelines, a large proportion of patients are receiving numerous medications, including combinations that often represent a risk, which can lead to a number of complications in drug treatment. A collaborative care approach including a medication review by a clinical pharmacist is a possible way of reducing drug-related problems, drug-drug interactions and irrational polypharmacy within this population.
The aim of the research was to clinically evaluate whether the direct involvement of the clinical pharmacist (pharmacist consultant) in the treatment with mainly psychotropic medications can have an impact on the quality of pharmacotherapy.
We conducted a non-interventional, retrospective, multicenter study that included patients from primary care community environment in Pomurje who were sent to a pharmacist consultant in a time period of three years, were 65 or older and were receiving 10 or more active substances at the same time, at least one of which was from the N group according to the ATC classification. All information on patient therapy, diagnosis and clinical pharmacists’ recommendations were obtained from the medical records. To evaluate whether patients were treated in line with the treatment guidelines, we used current treatment guidelines for individual diagnoses and the Priscus list for the evaluation of potentially inappropriate medications for the elderly. To evaluate the influence of the clinical pharmacist on the treatment according to guidelines for depression and treatment with antipsychotics, we used binary logistic regression to create statistical models.
246 patients were included in the study. Between them, they were receiving 3294 medications (14,6% were psychotropics). The pharmacists proposed 374 different interventions within psychopharmacotherapy. General practitioners accepted 169 interventions (45,2%). After the pharmacists’ interventions, the number of total medications decreased (from 13,4 to 12,4; p<0,001). The number of potential X-type drug-drug interactions decreased significantly (from 71 to 32, p<0,001), as did the number of potentially inappropriate medications in the elderly (from 312 to 244 or by 21,8%; p<0,001). The clinical pharmacists’ interventions have led to better adherence to current treatment guidelines in the treatment with antidepressants (p<0,001) and in antipsychotic therapy (p=0,003).
Despite encouraging results, the study had its limitations, including non-randomized controlled design and selection bias. Nonetheless, the results show a positive impact of clinical pharmacists’ interventions which led to reducing the number of total prescribed drugs, potential X-type interactions, the number of potentially inappropriate medications and better adherence to treatment guidelines within this population.
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