Polypharmacy among patients with multiple sclerosis: a qualitative systematic review

ABSTRACT

Objectives: The consequences of polypharmacy (intake of ≥ 5 drugs) are diverse, including drug interactions, rising costs and side effects. Risk groups for polypharmacy are multimorbid and chronically ill people, such as patients with multiple sclerosis (MS). MS is the most common neuroimmunological disease in young adults worldwide. We aimed to provide a systematic overview of the current research status regarding frequency and predictors of polypharmacy in MS patients.

Methods: A systematic literature search in the databases PubMed, Cochrane Library and Scopus was carried out according to the PRISMA guidelines. English and German original research articles were included.

Results: Seven studies fulfilled the inclusion criteria of this review, while the research objectives and methods were very heterogenous. The polypharmacy rates in these studies ranged from 15% to 59%. Polypharmacy correlated with comorbidities, increased disability, cognitive deficits, increased hospitalization, higher relapse rate and lower quality of life.

Conclusions: In MS patients, polypharmacy is common and closely associated with health issues. There is a great need for research in this area, especially regarding longitudinal changes in drug utilization. Effective networks between physicians and pharmacists are needed to optimize medication management for patients and to achieve the best possible therapy results.

KEYWORDS:

• Comorbidities
• medication management
• multiple sclerosis
• polypharmacy
• quality of life

Authors’ contributions

N Frahm and UK Zettl conceptualized and designed this paper. N Frahm carried out the literature search, extracted and interpreted the data and drafted this article. M Hecker and UK Zettl contributed to the writing of the paper and provided important intellectual content. All authors approved the final version of this paper for publication.

Declaration of interest

N Frahm received travel funds for research meetings from Novartis. M Hecker received speaking fees and travel funds from Bayer HealthCare, Biogen, Merck Serono, Novartis and Teva. UK Zettl received research support and lecture fees or travel funds from Almirall, Alexion, Bayer HealthCare, Biogen, Merck Serono, Novartis, Roche, Sanofi and Teva. The authors have no other relevant affiliations or financial involvement with any organization or entity with a financial interest in or financial conflict with the subject matter or materials discussed in the manuscript apart from those disclosed.

Reviewer disclosures

Peer reviewers on this manuscript have no relevant financial or other relationships to disclose.

Additional information

Funding

This study was not funded.