Internet-delivered cognitive behavioural therapy (ICBT) is an established way to treat social anxiety disorder. It is sometimes combined with an SSRI antidepressant such as escitalopram. Few studies, though, have tested whether the combination actually helps more than ICBT alone. A Swedish trial addressed this directly, randomising adults with social anxiety disorder to receive ICBT plus either escitalopram (24 people) or a placebo tablet (24 people), with brain imaging and a 15-month follow-up.
People who received escitalopram alongside ICBT were significantly more likely to respond to treatment than those who received placebo alongside ICBT. They also showed larger reductions in anxiety before a speech-like task straight after treatment, and larger reductions in overall social anxiety symptoms at the 15-month follow-up. Brain scans told a similar story: activity in the amygdala, a region involved in processing threat and emotion, dropped more in people who responded to treatment and in those who took escitalopram.
For someone with social anxiety disorder who has tried therapy alone without full relief, this study supports discussing medication as an addition, not a replacement, with a psychologist and GP or psychiatrist working together. If social anxiety is affecting your life, it is worth reaching out for support.
What the trial tested
Cognitive behavioural therapy delivered over the internet, known as ICBT, is a well-established treatment for social anxiety disorder. In clinical practice, ICBT and other forms of CBT are often combined with SSRI antidepressants such as escitalopram, but this trial notes that few studies had actually tested whether adding the medication improves outcomes compared with ICBT alone.
Researchers in Sweden ran a double-blind, randomised, placebo-controlled neuroimaging trial. Adults with social anxiety disorder were randomised to receive ICBT combined with either escitalopram (24 people) or a placebo tablet (24 people). Participants were followed clinically for 15 months, and brain activity was measured using functional MRI.
What it found
People who received escitalopram alongside ICBT were significantly more likely to be classified as clinical responders than those who received placebo alongside ICBT. They also showed larger reductions in anticipatory anxiety before a speech-like task, measured immediately after treatment finished. At the 15-month follow-up, the escitalopram-plus-ICBT group showed larger reductions in overall social anxiety symptom severity; at the end of treatment itself this difference was only at trend level, meaning it had not quite reached the usual threshold for statistical significance.
The brain imaging findings add a biological dimension to the clinical results. Reactivity in the right amygdala, a brain region central to processing threat and emotion, decreased more in the escitalopram-plus-ICBT group compared with the placebo-plus-ICBT group, and it decreased more in people who responded to treatment than in those who did not.
Why it matters
Social anxiety disorder is common and can significantly limit someone's work, study and relationships. Many people are offered ICBT or face-to-face CBT as first-line treatment, but not everyone achieves full relief from therapy alone. This trial provides direct evidence that adding escitalopram to CBT can improve both clinical outcomes and longer-term symptom reduction, rather than assuming the combination helps simply because both treatments work individually on their own. The brain imaging results also suggest a plausible biological pathway, through reduced amygdala reactivity, for why the combination may work better for some people.
Points to keep in mind
This was a relatively small trial, with 24 people in each group, run within a specific research setting using internet-delivered CBT rather than face-to-face therapy. The medication used was specifically escitalopram, and the results should not be assumed to generalise automatically to every SSRI or every anxiety disorder.
Decisions about adding medication to therapy for social anxiety disorder should be made with a psychologist, alongside a GP or psychiatrist who can prescribe and monitor medication. If social anxiety is limiting your life, whether or not you have tried therapy before, reaching out for professional support is a reasonable and often very helpful step.