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CTRI Number  CTRI/2025/03/082062 [Registered on: 10/03/2025] Trial Registered Prospectively
Last Modified On: 07/03/2025
Post Graduate Thesis  No 
Type of Trial  Interventional 
Type of Study   Medical Device 
Study Design  Randomized, Parallel Group, Placebo Controlled Trial 
Public Title of Study   A Safer, Faster Way to Manage Anxiety: The Role of tDCS 
Scientific Title of Study   Evaluation of Safety and Efficacy of tDCS in Conjunction with Pharmacotherapy for Mild to Moderate General Anxiety Disorder (GAD): A Double-Blind, Randomized, Placebo-Controlled Study.  
Trial Acronym  NIL 
Secondary IDs if Any  
Secondary ID  Identifier 
PT/24-25/001/V01/24-11-2024  Protocol Number 
 
Details of Principal Investigator or overall Trial Coordinator (multi-center study)  
Name  Dr Johnson Pradeep R 
Designation  HOD - Psychiatry Department 
Affiliation  St. Johns Medical College Hospital 
Address  Room F7 OPD 25 Psychiatry Department OPD Block St Johns Hospital Internal Rd John Nagar Koramangala Bengaluru Karnataka 560034

Bangalore
KARNATAKA
560034
India 
Phone  7892673938  
Fax    
Email  johnson.pr@stjohns.in  
 
Details of Contact Person
Scientific Query
 
Name  Dr Vishnu Vardhan Gopala Krishnan 
Designation  HOD - Psychiatry Department 
Affiliation  Raja Rajeswari Medical College and Hospital 
Address  Room No 2, Psychiatry Department, 202, Mysore Rd, Kengeri Satellite Town, Kambipura, Karnataka 560074

Bangalore
KARNATAKA
500056
India 
Phone  9845211970  
Fax    
Email  Myvish9@gmail.com  
 
Details of Contact Person
Public Query
 
Name  Kaushik M Gawali 
Designation  Chief Research Officer 
Affiliation  ClinEra Research Solutions 
Address  Room No 01, Research Department, First Floor, 2743, 27th Main, 15th Cross Rd, behind Domino Pizza, Bengaluru, Karnataka 560102

Hyderabad
TELANGANA
500056
India 
Phone  9959279640  
Fax    
Email  kaushik.gawali@cliniera.in  
 
Source of Monetary or Material Support  
CliniEra Research Solutions LLP, 32-80/p2/f-508, Venkateswara Lake Front, Sanik Nagar, Ramakrishnapuram, Neredmet, Hyderabad, Tirumalagiri, Telangana, India, 500056. 
Raja Rajeswari Medical College and Hospital, 202, Mysore Rd, Kengeri Satellite Town, Kambipura, Karnataka 560074, India 
St Johns Medical College Hospital, Sarjapur Road, Bangalore - 560034, Karnataka, India. 
 
Primary Sponsor  
Name  CLINIERA RESEARCH SOLUTIONS LLP 
Address  32-80/P2/F-508, Venkateshwara Lake Front, Sainik Nagar, Ramakrishnapuram, Neredmet, Secunderabad, Hyderabd, Telangana, India - 500056 
Type of Sponsor  Contract research organization 
 
Details of Secondary Sponsor  
Name  Address 
NIL  NIL 
 
Countries of Recruitment     India  
Sites of Study  
No of Sites = 2  
Name of Principal Investigator  Name of Site  Site Address  Phone/Fax/Email 
Dr Vishnu Vardha Gopalakrishnan  Raja Rajeswari Medical College and Hospital  202, Mysore Rd, Kengeri Satellite Town, Kambipura
Bangalore
KARNATAKA 
9845211970

mywish9@gmail.com 
Dr Johnson Pradeep R  St. Johns Medical College Hospital  193, 1, Hosur Rd, Santhosapuram, Koramangala Industrial Layout, Koramangala, Bengaluru, Karnataka 560034
Bangalore
KARNATAKA 
7892673938

johnson.pr@stjohns.in 
 
Details of Ethics Committee  
No of Ethics Committees= 2  
Name of Committee  Approval Status 
Rajarajeswari Medical College and Hospital – Institutional Ethics Committee  Approved 
St. John’s National Academy of Health Sciences  Approved 
 
Regulatory Clearance Status from DCGI  
Status 
Approved/Obtained 
 
Health Condition / Problems Studied  
Health Type  Condition 
Patients  (1) ICD-10 Condition: F411||Generalized anxiety disorder,  
 
Intervention / Comparator Agent  
Type  Name  Details 
Comparator Agent  Placebo  A placebo is a substance or treatment which is designed to have no therapeutic value, but it is similar to active devices. A placebo will be used which is similar to the treatment device in shape, size and color, but does not provide any therapeutic benefit to the patient. 
Intervention  Transcranial Direct Current Stimulation (tDCS) with Binaural Beats  A transcranial direct current stimulation device, intended to be used for treating Generalized anxiety disorder (GAD) by passing current from 0.1mA to 2.0 mA. Total duration of treatment will be 20 minutes per session. and for 25 days. 
 
Inclusion Criteria  
Age From  18.00 Year(s)
Age To  60.00 Year(s)
Gender  Both 
Details  1. Adults, 18 to 60 years of age at the time of screening of either gender (male and female).
2. Hamilton Anxiety Rating Scale (HAM-A) score ≥ 15 (Final threshold to be determined based on study focus on moderate to severe cases)
3. Subjects must meet all the following criteria for GAD as defined by DSM-5-TR:
Excessive anxiety and worry occurring for more days, but not more than 6 months.
Difficulty controlling worry
≥ 3 of the following symptoms:
Restlessness or feeling keyed up or on edge
Being easily fatigued
Difficulty concentrating or mind going blank
Irritability
Muscle tension
Sleep disturbance
Symptoms cause clinically significant distress or impairment.
Diagnosis confirmed by licensed mental health professional
4. No change in the dosage of Psychiatric medication for ≥ 4 weeks prior to enrolment
5. No change in the Psychotherapy ≥ 4 weeks prior to enrolment.
6. There should be no change in Psychiatric medication of the subject during the complete trial period.
7. No planned medication changes during the study period
8. Subjects with ability to sign informed consent form
9. Demonstrated understanding of study nature, risks and benefits
10. Fluent in consent language
11. Willing to comply with all study procedures and follow-up
 
 
ExclusionCriteria 
Details  1. Subject who participated in other study within the past 3 months.
2. Patients with a history of head trauma. Moderate to severe traumatic brain injury (TBI). Head injury requiring hospitalization. Loss of consciousness for more than 30 minutes in past 3 months. Post-concussive syndrome within past 2 years.
3. Patients with presence of metal implants in or around the head such as Cochlear implants, aneurysm clips, brain stimulators, skull plates, deep brain stimulators, shrapnel or bullet fragments, external hearing aids, any other implants in the opinion of PI hat could interfere with tDCS.
4. Patients with any history of neurological surgery such as brain surgery, neurological procedures involving skull, intracranial or cervical spine surgery, deep brain stimulation procedures.
5. Medical conditions including, cardiovascular disease (heart attacks, artery/valve related issues, arrhythmia etc.), thyroid dysfunction, active autoimmune conditions (systemic lupus erythematosus, multiple sclerosis, inflammatory bowel disorder etc.), chronic pain requiring opioid medication.
6. Patients with history of seizure or epilepsy, on current anticonvulsant medication use.
7. Patients with suicidal tendency such as, suicide attempt, current suicidal ideation, C-SSRS and MADRS score indicating any risk, history of multiple suicide attempts.
8. Dementia or mild cognitive impairment (MMSE score less than 24)
9. Uncorrected hearing/visual impairment affecting participation as per PI opinion.
10. Comorbid conditions which are schizophrenia or psychotic disorder, bipolar disorder (Type I or II), current major depressive episode, interfering personality disorders, psychiatric hospitalization within 6 months, somatoform or dissociate disorders, eating disorders, narcolepsy.
11. Substance use disorder within past 12 months, active substance use (excluding nicotine, caffeine), and alcohol consumption more than 14 units/week within the past week.
12. Subjects undergoing chemotherapy, or with a history of chemotherapy or cancer.
13. Pregnant, breastfeeding/lactating, or planning pregnancy during the study period.
14. If a patient is already enrolled in a clinical trial
15. History of Electroconvulsive Therapy (ECT)
16. Any medical condition apart from those mentioned above which in the opinion of PI would affect the study participation. 
 
Method of Generating Random Sequence   Stratified block randomization 
Method of Concealment   Centralized 
Blinding/Masking   Participant and Investigator Blinded 
Primary Outcome  
Outcome  TimePoints 
Establishing the Safety profile of Transcranial Direct Current Stimulation in Generalized Anxiety Disorder.
Reduction in anxiety symptoms, as measured by the provided scales (HAM-A, HDRS, PSQI, K-10, C-SSRS, MADRS and VAS) in the individuals with mild and moderate GAD following the use of the tDCS device. 
Baseline, 1 week, 2 weeks, 3 weeks, and 4 weeks 
 
Secondary Outcome  
Outcome  TimePoints 
Improvement in executive function, measured using validated neuropsychological assessments (Trail Making Part B, Mackworth Clock Test, Sternberg Task, Stop Signal Paradigm), in individuals with mild & moderate GAD after the intervention with the tDCS device.  Baseline, 1 week, 2 weeks, 3 weeks, & 4 weeks 
 
Target Sample Size   Total Sample Size="90"
Sample Size from India="90" 
Final Enrollment numbers achieved (Total)= "Applicable only for Completed/Terminated trials"
Final Enrollment numbers achieved (India)="Applicable only for Completed/Terminated trials" 
Phase of Trial   N/A 
Date of First Enrollment (India)   18/03/2025 
Date of Study Completion (India) Applicable only for Completed/Terminated trials 
Date of First Enrollment (Global)  Date Missing 
Date of Study Completion (Global) Applicable only for Completed/Terminated trials 
Estimated Duration of Trial   Years="0"
Months="6"
Days="0" 
Recruitment Status of Trial (Global)   Not Applicable 
Recruitment Status of Trial (India)  Open to Recruitment 
Publication Details   N/A 
Individual Participant Data (IPD) Sharing Statement

Will individual participant data (IPD) be shared publicly (including data dictionaries)?  

Response - NO
Brief Summary   This study evaluates the safety and efficacy of a transcranial direct current stimulation (tDCS) device in conjunction with pharmacotherapy for individuals with mild to moderate Generalized Anxiety Disorder (GAD). Conducted as a double-blind, randomized, placebo-controlled trial at Raja Rajeswari Medical College and St. John’s Medical College in Bengaluru, India, the study will enroll approximately 90 participants aged 18–60 years meeting DSM-5-TR criteria for GAD. Participants will be randomly assigned to receive either an active tDCS device or a non-functional placebo device for 20-minute sessions, five days a week, over three weeks, while continuing prescribed pharmacotherapy. The study will assess improvements in anxiety symptoms and executive function using tools like the Hamilton Anxiety Rating Scale (HAM-A), cognitive tasks (Trail Making Part B, Mackworth Clock Test), and Visual Analog Scales. Safety will be monitored through adverse event reporting. Exclusion criteria include severe comorbid medical or psychiatric conditions, substance use disorders, and pregnancy. Data will be analyzed using R software to establish the efficacy and safety of tDCS as an adjunct therapy for GAD. 
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