Neurotoxicity Research

, Volume 33, Issue 3, pp 621–633 | Cite as

Add-on Treatment with Curcumin Has Antidepressive Effects in Thai Patients with Major Depression: Results of a Randomized Double-Blind Placebo-Controlled Study

  • Buranee Kanchanatawan
  • Sookjaroen Tangwongchai
  • Atapol Sughondhabhirom
  • Siriluck Suppapitiporn
  • Solaphat Hemrunrojn
  • André F. Carvalho
  • Michael Maes


Activation of immune-inflammatory and oxidative-nitrosative (IO&NS) stress pathways plays a role in major depression (MDD). Evidence suggests that curcumin (500–1000 mg/day), a polyphenol with strong anti-IO&NS properties, may have efficacy either as monotherapy or as an adjunctive treatment for depression. Further controlled trials with extended treatment periods (> 8 weeks) and higher curcumin doses are warranted. This 12-week study was carried out to examine the effects of adjunctive curcumin for the treatment of MDD. In this double-blind, placebo-controlled trial, 65 participants with MDD were randomized to receive either adjunctive curcumin (increasing dose from 500 to 1500 mg/day) or placebo for 12 weeks. Four weeks after the active treatment phase, a follow-up visit was conducted at week 16. Assessments of the primary, i.e., the Montgomery-Asberg Depression Rating Scale (MADRS), and secondary, i.e., the Hamilton Anxiety Rating Scale (HAM-A), outcome measures were rated at baseline and 2, 4, 8, 12, and 16 weeks later. Curcumin was more efficacious than placebo in improving MADRS scores with significant differences between curcumin and placebo emerging at weeks 12 and 16. The effects of curcumin were more pronounced in males compared to females. There were no statistically significant treatment-emerging adverse effects and no significant effects of curcumin on blood chemistry and ECG measurements. Adjunctive curcumin has significant antidepressant effects in participants with MDD as evidenced by significant benefits occurring 12 and 16 weeks after treatment initiation. Curcumin administration was safe and well-tolerated even when combined with antidepressants. Future trials should include treatment-by-sex interactions to examine putative antidepressant effects of immune-modifying compounds.


Depression Oxidative and nitrosative stress Immune Inflammation 



This research has been supported by the Agricultural Research Developmental Agency (ARDA), Bangkok, Thailand. The funding agency played no role in dada reporting. The authors would like to thank Supaksorn Thika (ST) for her valuable help completing the rating scales.

Author’s Contributions

All the contributing authors have participated in the manuscript. BK and MM designed the study. BK recruited patients and completed diagnostic interviews. All authors contributed to interpretation of the data and writing of the manuscript. MM carried out the statistical analyses.

Compliance with Ethical Standards

Conflict of Interest

The authors have no conflict of interest with any commercial or other association in connection with the submitted article.


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Authors and Affiliations

  1. 1.Department of Psychiatry, Faculty of MedicineChulalongkorn UniversityBangkokThailand
  2. 2.Translational Psychiatry Research Group and Department of Clinical Medicine, Faculty of MedicineFederal University of CearáFortalezaBrazil
  3. 3.Department of PsychiatryMedical University PlovdivPlovdivBulgaria
  4. 4.IMPACT Strategic Research Center, Barwon HealthDeakin UniversityGeelongAustralia

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