Clinical trial Recruiting at 2 sites Phase 2 Interventional Ages 18 to 75

Evaluating BPL-003 for Treatment Resistant Depression

Official title: An Open-Label, Phase 2a Study to Evaluate the Safety, Tolerability and Pharmacodynamics of BPL-003 in Patients With Treatment Resistant Depression

Run by Beckley Psytech Limited · NCT05660642 · Data updated 2026-11-12

This study is testing a new nasal treatment called BPL-003 to see if it can help people with depression who haven't found relief from other medications.

Quick facts

PhasePhase 2
Study typeInterventional
Ages18 Years to 75 Years
SexAll
Enrollment72 (estimated)
SponsorBeckley Psytech Limited
Industry-sponsored
Locations3 sites (Liverpool and 2 other locations)
StatusRecruiting
StartedFebruary 10, 2023
Main results expectedNovember 2026
Study endsNovember 2026
Registry record updatedJuly 6, 2026
Trial IDNCT05660642 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are adults diagnosed with major depressive disorder who have not responded to at least two prior antidepressant treatments.

Probably not a fit

Patients with severe psychiatric disorders such as schizophrenia or bipolar disorder will not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This open-label, multi-centre Phase 2a study aims to assess the safety, tolerability, and pharmacodynamics of BPL-003, an intranasal treatment, in patients with treatment resistant depression. The study consists of two parts: the first part involves administering one of two single doses of BPL-003 to patients, while the second part involves two doses, both accompanied by psychological support. Participants will be monitored for 12 weeks in Part 1 and 10 weeks in Part 2 to evaluate the treatment's effects. The study includes patients who have not responded adequately to previous antidepressant therapies.

Why it matters

Potential benefit: If successful, this treatment could provide a new option for patients suffering from treatment resistant depression.

How similar studies have gone: Other studies exploring novel treatments for treatment resistant depression have shown promise, indicating potential for success with this approach.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

1. Diagnosed with Major Depressive Disorder.
2. Diagnosed with TRD defined as failure to respond to an adequate dose and duration of at least 2 pharmacological treatments in the past 5 years prior to screening, at least one of which is during the current episode.
3. Montgomery-Asberg Depression Rating Scale score ≥24 at Screening.
4. Clinical Global Impression - Severity ≥4 at Screening.
5. Willing and able to discontinue current pharmacological anti-depressant therapy.
6. On current stable dose of pharmacological antidepressant therapy limited to one of 4 SSRIs (Arm B), i.e. either citalopram, escitalopram, sertraline or fluoxetine.

Exclusion Criteria:

1. Current or history of schizophrenia, psychotic disorder including psychotic depression, bipolar disorder, delusional disorder, schizoaffective disorder, or any other severe psychiatric disorder.
2. Current personality disorders.
3. First-degree family history of schizophrenia, bipolar disorder, delusional disorder, personality disorders or schizoaffective disorder.
4. Current alcohol or substance use disorder (other than caffeine or nicotine).
5. A participant who at any time, has been unresponsive to ketamine, esketamine, an adequate course of treatment with electroconvulsive therapy, or has received vagal nerve stimulation or deep brain stimulation.
6. Suicidal ideation with the intent to act or suicidal behaviour within the 12 months prior to the start of Screening or on Day 1 prior to dosing.
7. Suicide attempt and/or self-injurious behaviour within the last 12 months prior to Screening.
8. Uncontrolled medical conditions e.g. hypo/hyperthyroidism, diabetes, renal failure.
9. Seizure disorder or history of seizures (including febrile seizures).
10. Abnormal and clinically significant results on the physical examination, vital signs, electrocardiogram, or laboratory tests at Screening Baseline.
11. Any nasal obstruction, blockage, or symptoms of congestion at the time of dosing, that in the Investigator's opinion may interfere with administration of the study drug.
12. Currently receiving lithium, antipsychotics, serotonergic drugs (excluding the permitted SSRIs for arm B), psychostimulants, or any other prohibited medication.
13. Female patients who are pregnant or lactating, or of childbearing potential and not willing to use adequate forms of contraception.
14. Male patients who are sexually active and not willing to using adequate forms of contraception.

Where it's running

  • MAC Clinical Research
    Liverpool, United Kingdom
    Recruiting
  • Hammersmith Medicines Research
    London, United Kingdom
    Recruiting
  • King's College London, Clinical Trials Facility
    London, United Kingdom
    Completed

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.