Summary: A clinical trial testing whether clozapine can be used earlier in the treatment of psychosis. This randomised controlled trial focuses on young people with treatment-resistant psychosis and aims to understand how well clozapine works in real-world NHS settings.
Inclusion / Exclusion Criteria:
Inclusion Criteria
• Age ≥12 and <25 years at baseline.
• Meets criteria for schizophrenia or related disorder, in the range ICD-10v2016 F20.x, F22.x-F29.x
• Meets NICE criteria for treatment resistance, defined as:
- a. Previous trials of at least two different antipsychotic drugs with adequate adherence (estimated <20% missed doses) – both treatment trials to exceed 4 weeks at adequate doses (within the dose range given in the British National Formulary and the British National Formulary for children).
- b. At least 1 of these trials must be with a second-generation drug.
• Positive and Negative Syndrome Scale (PANSS) total ≥70, at least 2 items >4
• Clinician Rating Scale [24] (CRS) ≥3.
• Capacity to give informed consent OR has a legal representative able to give consent to the study.
Exclusion Criteria:
• Psychosis predominantly caused by substance misuse.
• Pregnancy.
• Breastfeeding.
• Women of child-bearing potential (WOCBP*) not using at least acceptable methods of contraception** during the study
• Previous adequate trial of clozapine.
• CNS disorders (ICD-10 G00-26; G40-41, G45-46; G80-94, G97).
• Concurrent medications with documented interactions with antipsychotics.
• Participation in a clinical trial involving any unlicensed investigational medical product within the last 3 months.
• Positive test for COVID-19 within the past 10 days.
• Current Electroconvulsive Therapy (ECT)
• For participation in the substudy MRI scan only, standard contraindications to MRI at 3 Tesla such as ferromagnetic or electronic implants.
* WOCBP defined as: fertile, following menarche and until becoming post-menopausal unless permanently sterile. Permanent sterilisation methods include hysterectomy, bilateral salpingectomy and bilateral oophorectomy. A postmenopausal state is defined as no menses for 12 months without an alternative medical cause.
** acceptable methods of contraception include:
• progestogen-only oral hormonal contraception, where inhibition of ovulation is not the primary mode of action
• male or female condom with or without spermicide ***
• cap, diaphragm or sponge with spermicide ***
*** A combination of male condom with either cap, diaphragm or sponge with spermicide (double barrier methods) are also considered acceptable, but not highly effective, birth control methods 23
Acceptable methods are the minimum requirement. It should be noted that the requirement for ‘at least acceptable methods of contraception’ would include the above methods but also include all ‘highly effective’ methods listed below:
• combined (estrogen and progestogen containing) hormonal
• contraception associated with inhibition of ovulation 1: oral
• intravaginal
• transdermal
• progestogen-only hormonal contraception associated with inhibition of ovulation 1: oral
• injectable
• implantable
• intrauterine device (IUD)
• intrauterine hormone-releasing system ( IUS)
• bilateral tubal occlusion
• vasectomised partner
• sexual abstinence (if defined as refraining from heterosexual intercourse during the entire period of risk associated with the study treatments).
ELFT Principal Investigator: Dr Alex Sales
To learn more, email: Adanna Uzoma (Lead CSA for CLEAR)