• Stefania Di Gangi, Stefan Markun, Thomas Rosemann, and Andreas Plate.
• Institute of Primary Care, University and University Hospital of Zürich, Zürich, Switzerland.
• Patient Prefer Adher. 2020 Jan 1; 14: 2531-2539.

PurposeSleeping disturbances are highly prevalent in the general population, and pharmacological drug treatment harbours the risk of serious side effects. Many affected persons use dietary supplements for self-treating their symptoms, but little is known about the specific characteristics and preferences of these patients. Even less evidence exists about the consequences of a specific dietary supplement usage on health care utilization. The aim of this study was to explore characteristics, preferences and the impact on health care utilization in patients using a specific over-the-counter dietary supplement, which is promoted for improving sleeping disturbances.Patients And MethodsWe conducted a structured survey and invited a sample of 297 customers of a specific dietary supplement to participate. The survey was open between June and September 2020. Participants were invited by email. All participants accepted an informed consent.ResultsA total of 127 customers participated in the survey (participation rate: 42.8%). Of them, 87.7% were female and the mean age 50.5 years. Participants reported an overall good improvement of symptoms (7.66 on a ten-point Likert-scale) and showed a strong belief in the effectiveness of supplements in general; 67% of participants reported that the intake led to fever physician encounters, and 48.3% reported that they could stop the intake of other pharmaceutical sleeping drugs.ConclusionA significant proportion of participants reported a substantial reduction in pharmaceutical drug use and health care utilization. While these self-reports lack an adequate control, they are still real consumer experiences, and the large beneficial effects - whether placebo or not - explain the popularity of such supplements and their therapeutic potential in sleeping disorders.© 2020 Di Gangi et al.

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