Table of Contents
- Trial overview
- Study design and groups
- Who can participate
- What is being measured
- Study status and size
Trial overview
The available trial data describe one interventional study of TRAZODONE HYDROCHLORIDE in adults with treatment-resistant depression, which means depression that has not improved enough with usual treatment.[1] The study is titled “Efficacy of psilocybin and trazodone combination in treatment-resistant depression: a randomized controlled proof-of-concept study (PSILOTRAZ).”[1]
This study is in Phase 2, so it is looking for early signs that the treatment approach may help and is also monitoring the research process closely.[1] The status is Authorised.[1]
Study design and groups
The study is a randomized controlled proof-of-concept study, which means participants are assigned to groups by chance and the results are compared across groups.[1] The brief summary says the trial is testing a single administration of psilocybin 25 mg plus TRAZODONE HYDROCHLORIDE 30 mg, compared with placebo, with psychotherapeutic support in adult patients with TRD.[1]
The intervention list shows several study arms, including psilocybin 25 mg capsules, TRAZODONE HYDROCHLORIDE oral drops, and placebo versions for comparison.[1] In simple terms, the trial is trying to find out whether the active treatment combination works better than inactive comparison treatments.[1]
Who can participate
The target population in the trial data is adult patients with treatment-resistant depression.[1] No other detailed eligibility rules are provided in the source data, so the main known requirement is having TRD and being an adult.[1]
The study also includes psychotherapeutic support, meaning therapy support is part of the research setting for participants.[1] This tells us the trial is not only testing the study drugs, but also evaluating them in a supported clinical environment.[1]
What is being measured
The primary outcome is the efficacy of the single administration of the psilocybin plus TRAZODONE HYDROCHLORIDE combination at 1 month.[1] Efficacy means how well the treatment works.[1]
Researchers will measure the mean difference in Montgomery-Åsberg Depression Rating Scale (MADRS) scores between baseline and 1 month, comparing the group receiving psilocybin plus TRAZODONE HYDROCHLORIDE with the placebo plus trazodone group.[1] MADRS is a scale used to rate depression severity, so a change in score helps show whether symptoms improve.[1]
Study status and size
The trial is listed as Authorised and plans to enroll 112 participants.[1] This gives a sense of the study size and shows that the research is still in a controlled testing stage rather than routine care.[1]
Only one trial is provided in the source data, so the current clinical trial picture for TRAZODONE HYDROCHLORIDE here is focused on this single Phase 2 depression study.[1]



