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Pharmacist-based Donepezil Outpatient Consultation Service to improve medication persistence

Authors Watanabe N, Yamamura K, Suzuki Y, Umegaki H, Shigeno K, Matsushita R, Sai Y, Miyamoto K, Yamada K

Received 13 June 2012

Accepted for publication 24 July 2012

Published 28 August 2012 Volume 2012:6 Pages 605—611

DOI https://doi.org/10.2147/PPA.S34984

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 2

Norio Watanabe,1,2 Keiko Yamamura,3 Yusuke Suzuki,4 Hiroyuki Umegaki,4 Katsuro Shigeno,5 Ryo Matsushita,1 Yoshimichi Sai,1 Ken-ichi Miyamoto,1 Kiyofumi Yamada6

1Department of Clinical Pharmacy, Graduate School of Natural Science and Technology, Kanazawa University, Kanazawa, Ishikawa, Japan; 2Department of Pharmacy, Hashima Municipal Hospital, Hashima, Gifu, Japan; 3Department of Clinical Pharmacy, School of Pharmacy, Aichi Gakuin University, Nagoya, Aichi, Japan; 4Department of Community Healthcare and Geriatrics, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan; 5Department of Pharmacy Practice and Sciences, School of Pharmacy, Aichi Gakuin University, Nagoya, Aichi, Japan; 6Department of Neuropsychopharmacology and Hospital Pharmacy, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan

Aim: Donepezil is widely used to delay the progression of cognitive dysfunction in patients with Alzheimer's disease (AD), but the efficacy of pharmacotherapy is often reduced by poor adherence to medication. In order to improve adherence by providing information about AD and the significance of pharmacotherapy, the Donepezil Outpatient Consultation Service (DOCS) was set up. The influence of this service on medication persistence was assessed in the present study.
Methods: Among outpatients starting donepezil therapy, we enrolled 59 patients between April 2008 and September 2010 before establishment of the DOCS (non-DOCS group) and 52 patients between October 2010 and March 2012 who attended the DOCS (DOCS group). Each patient's and their caregiver's understanding about the clinical features of AD and pharmacotherapy with donepezil were also assessed. Their understanding was compared before and after the DOCS, and the 1-year medication persistence rate and the reasons for discontinuation were also investigated.
Results: The 1-year medication persistence rate was significantly higher in the DOCS group than in the non-DOCS group (73.1% vs 49.2%, P = 0.008). We examined the association of medication persistence with age, sex, clinical dementia rating, living alone, and attending the DOCS. As a result, medication persistence was significantly higher in patients attending the DOCS. The main reasons for discontinuation of donepezil were transfer elsewhere (11) and gastrointestinal side effects (5) in the non-DOCS group, and transfer (9) and gastrointestinal side effects (3) in the DOCS group. The overall score for understanding was 2.5 ± 1.7 before attending the DOCS and it increased significantly to 5.7 ± 0.7 afterward (P < 0.001).
Conclusion: The DOCS consultation provided by hospital pharmacists for AD patients and their caregivers improved understanding about the clinical features of dementia and provided pharmacological knowledge about antidementia drugs, leading to better adherence to pharmacotherapy that could maximize its effect.

Keywords: Alzheimer's disease, cholinesterase inhibitors, consultation, donepezil, patient knowledge, pharmacists

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