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Effectiveness of melatonin for the treatment of nocturia: a randomized controlled trial


Introduction and hypothesis

Nocturia affects health and quality of life (QoL). Current medical treatments can cause severe adverse effects, especially when treating elderly patients. Endogenous melatonin has a physiologic role in urinary bladder function, and the exogenous one may be beneficial for this condition. This article aims to evaluate the effectiveness and safety of melatonin for ameliorating nocturia in older women.


This randomized, double-blind, placebo-controlled trial was conducted at a university hospital in Thailand. Sixty women with nocturia, aged > 55 years, were prospectively recruited and were later randomly allocated to treatment (melatonin 2 mg/day, n = 30) and control (placebo, n = 30) arms for 2 weeks. Outcome measures included nocturia episodes, nocturia-related parameters, Nocturia Quality of Life Questionnaire (N-QoL) scores, and adverse events.


The treatment and control groups were comparable in mean age (65.9 + 7.5 vs. 68.5 + 6.3 years). Both groups had comparable causes of nocturia with a baseline median voiding frequency of 2.3 (1.3, 6.3) and 2.3 (1.7, 5.3) episodes/night, respectively. The treatment group had significantly better outcomes than the placebo group in terms of median reduction in nocturia [-1.0 (-3.0, 0.0) vs. 0.0 (-2.3, 1.3) episodes/night; p < 0.001], increased median duration of the first uninterrupted sleep [1.0 (-0.3, 4.5) vs. 0.0 (-3.0, 2.3) h; p < 0.001], and improvement in N-QoL scoring, especially in the sleep/energy subscale (p = 0.019) and the total score (p = 0.016). Adverse events were comparable between groups.


Melatonin can be considered a safe and effective treatment for nocturia in elderly women.

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The authors gratefully acknowledge the women who generously agreed to participate in this study and Ms. Nerisa Thornsri, MSc of the Research Group and Research Network Division, Research Department, Faculty of Medicine Siriraj Hospital, Mahidol University, for assistance with statistical analysis.


The study was funded by a grant from Siriraj Routine to Research (R2R), Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand

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Authors and Affiliations



P Leerasiri: Protocol development, Data analysis, Manuscript editing

P Pariyaeksut: Data collection, Data analysis, Manuscript writing

P Hengrasmee: Manuscript editing

C Asumpinwong: Protocol development, Manuscript editing

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Correspondence to Chutimon Asumpinwong.

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Leerasiri, P., Pariyaeksut, P., Hengrasmee, P. et al. Effectiveness of melatonin for the treatment of nocturia: a randomized controlled trial. Int Urogynecol J 34, 485–492 (2023).

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