Accelerated High-Dose tDCS for Depression

This study is testing an accelerated, high-dose version of transcranial direct current stimulation (tDCS) — a non-invasive brain stimulation technique that uses mild electrical currents — as a treatment for depression. The goal is to see if this approach can quickly improve depressive symptoms. **You may be eligible if...** - You are between 18 and 70 years old - You have been diagnosed with major depressive disorder (MDD) - Your depression symptoms are at a moderate-to-severe level (PHQ-9 score above 9) - You speak English fluently **You may NOT be eligible if...** - You have bipolar disorder or a psychotic condition - You have serious suicidal thoughts or behaviors requiring immediate intensive care - You have used brain stimulation therapies (like ECT or TMS) in the past 6 months - You have a history of seizures, metal implants in your head or chest, or brain surgery - You are pregnant - You have a moderate-to-severe substance use disorder - You have skin conditions or wounds on the scalp where electrodes would be placed Talk to your doctor to see if this trial is right for you.