How do I find Depression clinical trials in the UK?

Use TrialConnect to search for actively recruiting Depression clinical trials across the UK. Our results come directly from ClinicalTrials.gov and include eligibility criteria, trial phase, and contact details for each study.

Am I eligible for a Depression clinical trial?

Eligibility depends on factors specific to your condition such as disease stage, prior treatments, biomarker status, age, and overall health. Each trial has inclusion and exclusion criteria. Use our Smart Matcher to find trials matched to your specific situation.

Are Depression clinical trials free to participate in?

Yes. All clinical trials in the UK are free to participate in. The NHS or the trial sponsor covers all medical costs. Some trials also reimburse travel expenses and offer compensation for your time, especially in early-phase studies.

Condition Guide

Depression Clinical Trials in the UK (2026)

26 May 20269 min read

1 in 6

UK adults with depression

100+

UK trials recruiting

20+

Novel mechanisms in trials

Depression affects around 1 in 6 adults in the UK. While antidepressants and talking therapies help many people, around a third do not respond adequately to first-line treatments. Clinical trials offer access to new treatments that are not yet widely available, including innovative drug mechanisms, neuromodulation techniques, and psychedelic-assisted therapy. This guide covers the main types of depression trials currently recruiting in the UK.

Major Current Research Areas

Psychedelic-Assisted Therapy

The UK is a hub for psilocybin and MDMA research. Trials combine these substances with structured psychological support, showing promise for treatment-resistant depression. Multiple Phase 2 and Phase 3 trials are recruiting through UK sites including Imperial College London and UCL.

Ketamine and Esketamine

Esketamine nasal spray (Spravato) is NHS-approved for TRD but only available through specialist clinics. Trials test different dosing schedules, oral formulations, and biomarkers to predict response. Several Phase 3 trials explore ketamine in combination with psychotherapy.

Neuromodulation

Transcranial Magnetic Stimulation (TMS) is approved but trials test accelerated protocols, deep TMS, and targeted stimulation using fMRI-guided approaches. Invasive techniques including deep brain stimulation (DBS) are in controlled trials for highly refractory depression.

Digital Therapeutics

UK trials evaluate AI-guided CBT apps, digital phenotyping (using smartphone data to detect mood changes), and virtual reality exposure therapy. Some studies integrate continuous monitoring with wearable devices to personalise treatment.

Treatment Lines and Trial Eligibility

First-line treatment — Trials for patients newly starting antidepressant therapy, comparing SSRIs with newer mechanisms
Second-line / switching — For patients who have tried one antidepressant without adequate response
Treatment-resistant depression (TRD) — Defined as failure of two or more adequate antidepressant trials. This is the most active trial area, including ketamine, psychedelics, and neuromodulation studies
Maintenance / relapse prevention — Long-term trials for patients who have achieved remission and want to stay well

Common Eligibility Criteria

Diagnosis of Major Depressive Disorder (MDD) using DSM-5 criteria, confirmed by structured clinical interview
Moderate to severe depression (typically HAM-D score ≥17 or MADRS score ≥22)
Treatment history — number and type of prior antidepressants tried
No active suicidality (most trials exclude immediate high risk)
No current substance use disorder (varies by study)
Stable on existing medications (often a 4-week washout for psychedelic trials)
Age range (most 18-65, some studies accept older adults)

Important: Depression trials have specific psychological suitability criteria, particularly for psychedelic-assisted therapy studies. You will usually need a screening interview with the trial psychiatrist. Use our Smart Matcher to find trials matching your treatment history.

UK Trial Locations

Major depression research centres include:

London — King's College London (IoPPN), UCL, Imperial College
Manchester — Greater Manchester Mental Health NHS Foundation Trust
Edinburgh — University of Edinburgh, NHS Lothian
Cambridge — Cambridgeshire and Peterborough NHS Foundation Trust
Cardiff — Cardiff University, MRC Centre for Neuropsychiatric Genetics
Glasgow — NHS Greater Glasgow and Clyde

What Participation Involves

Psychological and safety assessments before and during the trial
Regular depression rating scales (PHQ-9, HAM-D, MADRS)
Blood tests for drug level monitoring and safety
For psychedelic trials: several full-day dosing sessions with psychological support
Follow-up appointments to monitor sustained response

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