• Congchong Wu, Xingyang Chen, Jianbo Lai, Yi Xu, and Shaohua Hu.
• Department of Psychiatry, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou.
• Medicine (Baltimore). 2020 Jun 26; 99 (26): e20981.

BackgroundBipolar disorder (BD) is a chronic and disabling psychiatric disorder. The treatment of BD still remains a significant clinical challenge due to the complex nature of the disease. Nutraceutical therapy as adjunctive role is a promising therapy for BD. Sulforaphane (SFN), a broccoli extract, was reported to be effective for emotional problems and cognitive impairment. However, clinical research of SFN in the treatment of BD was rare. Therefore, this study is designed to evaluate the adjuvant role of SFN in the treatment of BD.MethodsThis is a randomized, double-blinded, placebo-controlled, parallel-group clinical trial. A total of 100 patients who meet inclusion criteria will be assigned to receive quetiapine plus SFN or quetiapine plus placebo in a 1:1 ratio. The total duration of the study will be 12 weeks including 5 follow ups. The primary outcome is in the Montgomery-Asberg depression rating scale. The secondary outcomes are the quick inventory of depressive symptomatology-self report, Hamilton anxiety rating scale, young mania rating scale, cognitive function, inflammatory factors, and intestinal flora. Any adverse events will be recorded throughout the trial.DiscussionThis trial will provide evidences to evaluate the efficacy and safety of SFN combined with quetiapine in the treatment of BD patients, as well as the adjuvant role of SFN in combination.Trial RegistrationThis study protocol was registered at the Chinese clinical trial registry (ChiCTR2000028706).

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