Year : 2020  |  Volume : 62  |  Issue : 5  |  Page : 572--576

Transcranial direct current stimulation for refractory auditory hallucinations in schizophrenia: Acute and 16-week outcomes


Pattath Narayanan Suresh Kumar1, Arun Gopala Krishnan1, Rohith Suresh2, Chittaranjan Andrade3 
1 Department of Psychiatry, KMCT Medical College, Kozhikode, Kerala, India
2 Department of Medicine, Government Medical College, Ernamkulam, Kerala, India
3 Department of Psychopharmacology, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India

Correspondence Address:
Pattath Narayanan Suresh Kumar
Anaswara, Vazhathuruthi Road, P.O.Civil Station, Kozhikode - 673 020, Kerala
India

Background: Transcranial direct current stimulation (tDCS) has demonstrated efficacy against antipsychotic-refractory auditory verbal hallucinations (AVH) in schizophrenia. The duration of persistence of benefit is not well characterized. Materials and Methods: Thirty-one adults with schizophrenia and medication-refractory AVH were treated with 2–3 mA tDCS in 30 min sessions, twice a day, 6 days a week, for 2–4 weeks. The anode was sited over F3 and the cathode midway between T3 and P3 in the 10–20 EEG system. Patients were assessed until a 4-month study endpoint using two auditory hallucination rating scales and the Positive and Negative Syndrome Scale (PANSS-N). Results: Auditory hallucinations were moderately reduced by tDCS with 25%–29% improvement evident by the end of the 2nd week and another 10% improvement between week 2 and 4 months. There was no loss of benefit at the end of the 4-month study. There was also a small (11%) but statistically significant improvement in PANSS-N scores. Conclusions: Although this study is limited by the nonblind, uncontrolled design, the results suggest that tDCS, as delivered, holds promise for treating refractory AVH in schizophrenia; the benefits persist beyond the short term.


How to cite this article:
Suresh Kumar PN, Krishnan AG, Suresh R, Andrade C. Transcranial direct current stimulation for refractory auditory hallucinations in schizophrenia: Acute and 16-week outcomes.Indian J Psychiatry 2020;62:572-576


How to cite this URL:
Suresh Kumar PN, Krishnan AG, Suresh R, Andrade C. Transcranial direct current stimulation for refractory auditory hallucinations in schizophrenia: Acute and 16-week outcomes. Indian J Psychiatry [serial online] 2020 [cited 2020 Nov 27 ];62:572-576
Available from: https://www.indianjpsychiatry.org/article.asp?issn=0019-5545;year=2020;volume=62;issue=5;spage=572;epage=576;aulast=Suresh;type=0