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Taking people in NetherlandsPhase 4

Tests genetic-guided medicine advice for mood, anxiety or psychotic disorders

Compares medicine choices guided by genetic testing with usual dosing in psychiatric patients.

Key facts

Who runs it
Parnassia Groep
Where
Amsterdam, NetherlandsSee the siteAlso in 6 other countries, 7 sites
Registry title
Clinical Study Evaluating Pharmacogenomics-informed Pharmacotherapy Versus Dosing as Usual in Psychiatric Disorders
Status
Recruiting
Phase
Phase 4
People taking part
2,500 people, planned
Started
23 Feb 2023
Planned end
Sept 2026
Type of study
Interventional, 2 groupsOne group gets no study treatment, for comparison.
Treatments tested
  • Personalised medication advice based on pharmacogenetic testing
Record updated
2 June 2026

Who can take part

AI summary

From the trial's eligibility criteria. Machine-read from the registry text on this page, so it can be wrong. The registry text below and the trial team decide who can take part.

The trial is looking for people aged 16 to under 70 with depression, anxiety or a psychotic disorder of at least moderate severity, who are switching to a new psychiatric medicine after an earlier one did not work well or caused problems.

Age
From 16 years to under 70 years.
Sex
All sexes can join.
Disease stage
Depressive episode in major depressive disorder or bipolar disorder (score of 14 or higher on a depression scale), or panic disorder or generalised anxiety disorder (score of 18 or higher on an anxiety scale), or schizophrenia or schizoaffective disorder (score of 75 or higher on a symptom scale). Currently in inpatient or outpatient psychiatric treatment.
Earlier treatment
Must have had at least 1 psychotropic medicine in their life that did not work well enough or was stopped because of side effects. Must be about to switch, or have switched within the last 2 weeks, to sertraline or escitalopram (mood or anxiety disorders) or aripiprazole or risperidone (psychotic disorders). People who never took psychotropic medicine cannot join.

Main reasons for not taking part

  • Earlier pharmacogenomic (gene-based medicine) testing
  • Never having taken psychotropic medicine
  • Severe body illness such as liver disease, kidney disease, diabetes or a prolonged QT-interval on a heart test
  • Alcohol or substance abuse or dependence (nicotine excepted)
  • Taking five or more medicines regularly, or being pregnant or breastfeeding

The registry criteria, word for word

Show all 15 criteriaShow less

Who can take part

  • Suffer from a depressive episode (major depressive disorder and bipolar disorder (currently depressive episode)) (as assessed by the MINI International Neuropsychiatric Interview (M.I.N.I.) in agreement with Diagnostic and Statistical Manual (DSM-5 criteria) of at least moderate severity (assessed using the Structured Interview Guide for the Hamilton Depression Scale (SIGH-D) with a score of 14 or higher) and/or suffer from an anxiety disorder (panic disorder, generalised anxiety disorder) (as assessed by the M.I.N.I. in agreement with DSM-5 criteria) of at least moderate severity (assessed using the Structured Interview Guide for the Hamilton Anxiety Scale (SIGH- A) with a score of 18 or higher) and/or suffer from a psychotic disorder (schizophrenia and schizoaffective disorder) (as assessed by the M.I.N.I. in agreement with DSM-5 criteria) of at least moderate severity (assessed using the Positive and Negative Symptom Scale (PANSS) with a score of 75 or higher)
  • Have had an inadequate response to at least 1 psychotropic treatment during their life-time. Inadequate response is defined as insufficient efficacy of a psychotropic treatment when dosed high enough and maintained long enough, or discontinuation of a psychotropic treatment due to AEs or intolerability
  • Are about to switch (or have switched within the last 2 weeks prior to first contact with an investigator) to sertraline or escitalopram (for patients with mood or anxiety disorders), or to aripiprazole or risperidone (for patients with psychotic disorders) due to an inadequate response to or intolerance of the current/ previous medication
  • Currently receiving inpatient or outpatient psychiatric treatment
  • Be able to understand the requirements of the study and provide written informed consent to participate in this study; a signed and dated informed consent form (ICF) will be obtained from each patient before participation in the study
  • To give written consent to the use and disclosure of clinical data from their medical records for the purpose of this study
  • Age between ≥16 and <70 years
  • Ownership of a mobile phone (Android or iOS operation system) for passive monitoring

Who cannot take part

  • Patients with a history of prior pharmacogenomic testing
  • Patients with no prior use of psychotropic medication (medication-naïve patients)
  • Polypharmacy defined as the routine use of five or more medications including over- the-counter, prescription and/or traditional and complementary medicines used by a patient (WHO 2019)
  • Severe somatic comorbidities as reported in the subject's medical history or based on clinical chemistry/electrocardiography (ECG) results up to six months ago. If any of these comorbidities is detected on the basis of physical examination and/or clinical chemistry and/or ECG at the screening visit, participation is not possible; Liver disease defined as follows: Alanine-Aminotransferase (ALAT) >70u/L; Renal disease: Estimated glomerular filtration rate (eGFR) < 60ml/min/1.73m2; Diabetes: Blood glucose > 11.1 mmol/L or twice a fasting glucose > 7.0 mmol/L; Cardiac disease: prolonged QT-interval
  • Alcohol and/or substance abuse and/or dependence (except nicotine)
  • Inability to use the mobile phone application
  • Pregnant or breastfeeding women

Check if you might fit

Answer for yourself. This is not a decision: only the study team can say whether you can take part.

  • Are you between 16 and 70 years old?

Where in Netherlands

Also in 6 other countries, 7 sites

  • Parassia Groep B.V.Amsterdam, NetherlandsTaking people

About the trial

What the trial wants to find out

A 24-week, patient- and rater-blinded, two-arm, parallel-group controlled, and multi-centre randomized clinical trial (RCT) to establish the benefits of pharmacogenetics-informed pharmacotherapy versus dosing as usual (DAU) in psychiatric patients suffering from mood, anxiety, or psychotic disorders.

The 2 groups in the trial

  • PSY-PGx GroupTreatment being tested

    This is the intervention group. All patients will be treated according to a personalised medication recommendation based on the results of pharmacogenetic testing, following the prespecified dosing guideline. Prescribing physicians will prescribe one of the predefined drugs and will be unblinded for genotype and the resulting metabolisation phenotype.

    Treatment: Personalised medication advice based on pharmacogenetic testing

  • Dosing as usual (DAU) groupNo study treatment, for comparison

    This is the control group. In this group, prescribing physicians will also prescribe one of the predefined drugs, but will remain blinded to their patients' genotype and resulting metabolism phenotype for the duration of their participation in the study. After the study, patients in the control group will also be given their pharmacogenetic profile, which will make it possible to personalise their medication if necessary.

Questions to ask the study team

  1. How often do I need to come in, and for how long each time?
  2. Are travel costs paid?
  3. Can I keep my own doctor?
  4. What happens if I want to stop?

Contact the study team: see the registry record → Contacts and Locations

Print a page for my doctor

Data and sources

Registry record
Listed on ClinicalTrials.gov and on the EU's official list of trials (CTIS).
Official title
A New Intervention for Implementation of Pharmacogenetics in Psychiatry
Plain-language title
Tests genetic-guided medicine advice for mood, anxiety or psychotic disordersGenerated from the registry record. The registry title is the official one.
AI summary
From the trial's eligibility criteria. Read by machine on 12 November 2026.
Fit questions
Built from NCT05656469, who can take part
Record updated
2 June 2026