Transcranial Magnetic Stimulation Offers Hope for Treatment-Resistant Depression in Chilean Youth

In Chile, three out of every four young people carry symptoms of anxiety or depression. The country ranks second globally in adolescent suicide rates, a distinction that arrives with a grim footnote: ninety percent of those deaths are tied to untreated mental illness. For families watching their teenagers sink into a darkness that resists every conventional remedy, the statistics feel less like data and more like a countdown.

Emilia was sixteen when her father Javier brought her to a psychiatrist for what would become the first of many attempts to pull her back. She had always been emotionally sensitive, he recalls—therapy since childhood, multiple medication trials, none of them landing. As she entered adolescence, depression took hold. Antidepressants came next, but Emilia rejected them. She grew reactive, withdrawn. Javier watched his daughter disappear into a condition doctors would eventually name: treatment-resistant depression. He was not alone in this vigil. Across Chile, families were knocking on the same doors, hearing the same explanations, finding the same empty hands.

The numbers tell part of the story. Government surveys show that 26.5 percent of Chilean adolescents display moderate to severe symptoms of anxiety and depression—a figure the government itself flagged as cause for concern. Suicide remains among the leading causes of death for people aged fifteen to twenty-nine, surpassing global averages tracked by the World Health Organization. And within the population of depressed youth, between twenty-five and forty percent do not respond to standard treatments: antidepressants, psychotherapy, the interventions that typically begin to work within two to three weeks. When those fail, the risk of suicidal ideation climbs sharply.

Dr. María José Arroyo, a child and adolescent psychiatrist at Brain Treatment Center Chile, defines the clinical threshold clearly: a young person with depression symptoms lasting more than a year, having tried at least two different medication regimens over six to eight weeks with no improvement, meets the definition of treatment-resistant depression. The body simply will not respond. The mind remains trapped. For these patients, conventional medicine has run out of answers.

Transcranial Magnetic Stimulation—TMS—enters the picture as a different kind of tool. It is not a drug. It is not talk therapy. Instead, an electromagnetic coil placed against the scalp generates a magnetic field that penetrates roughly two centimeters into the brain's cortex, modulating neural activity in the circuits that govern mood regulation. The procedure is non-invasive, painless, and approved by the FDA for patients as young as fifteen. The number of sessions is determined after initial evaluation. Dr. Arroyo notes that while forty percent of adolescents with depression prove resistant to medication, TMS offers a seventy percent response rate in those same patients—and without the side effects that often accompany pharmaceutical treatment.

When Emilia underwent TMS, the change arrived quickly. Within weeks, her father saw his daughter return. She became motivated again, her concentration sharpened, her mood lifted. The mornings that once required coaxing now found her ready first. The family recovered moments of lightness they thought were gone. Javier describes the transformation as "very impressive," a word that carries the weight of relief and astonishment.

Clinical evidence supports what families like Emilia's are experiencing. Research published in Clinical Neurophysiology documents that TMS achieves remission of depression in forty-one percent of adolescent patients, eliminates anxiety symptoms in one of every three, and erases active suicidal ideation in more than sixty percent of those who entered treatment with self-harm thoughts. Some of these changes appear within the first week. For families exhausted by failed treatments and the constant shadow of suicide risk, TMS represents not just another option but a genuine turning point—a moment when the door finally opens.