NCT05656469 · Parnassia Groep
Clinical Study Evaluating Pharmacogenomics-informed Pharmacotherapy Versus Dosing as Usual in Psychiatric Disorders
(PSY-PGx)
What this study is about
A 24-week, patient- and rater-blinded, two-treatment group$1, parallel-group controlled, and multi-centre randomly assigned 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.
View original scientific description
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.
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- 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.
Exclusion criteria
- Patients with a history of prior pharmacogenomic testing
- Patients with no prior use of psychotropic medication (medication-naïve patients)
- 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)
- 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).
- Inability to use the mobile phone application
- Pregnant or breastfeeding women
Where
- Syracuse, New York
Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced Jun 2, 2026 · Source of record for eligibility and locations