SchizophreniaPhase 4Breier-StanleyNCT01339858
The Effect of N-Acetyl Cysteine on Cortical Erosion in Early Stage Schizophrenia
A Phase 4 study testing N-Acetyl Cysteine and sugar pill in people with Schizophrenia and Psychotic Disorder NOS, run by Indiana University at 2 sites in United States.
Trial summary
The primary objective of this study is to determine if NAC, added to existing antipsychotic treatment, is superior to placebo for cortical erosion in patients with early stage psychosis. Read more about this study
- Who is it for?
- Ages 16 to 35 yearsHealthy volunteers can take part
- Conditions the study is for
- Schizophrenia, Psychotic Disorder NOS, Schizoaffective Disorder
- What is being tested?
- N-Acetyl Cysteine and sugar pill
- Type of treatment
- Pill or oral medicine
- Could I receive a placebo?
- Yes, some participants may receive a placebo
- How many people
- 60 participants
- Where
- 2 sitesUnited States
- Study dates
- May 2011to Dec 2015
- Phase
- Phase 4
- Are there results?
- Yes, posted in the registrySummary in the doctors' view
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 16 to 35 years
- All sexes
- Healthy volunteers accepted
- Child, Adult
Who may be able to join
- Patients with a DSM-IV diagnosis of schizophrenia, schizophreniform, schizoaffective, psychosis disorder NOS
- Age range 16-35 years
- Male or female
- Within 2 years of the first onset of psychotic symptoms that resulted in work/school/social dysfunction and/or treatment (PI will review potential subjects who have been experiencing symptoms >2 years but <5 years and will allow to enter the trial on a case-by-case basis)
- Ability to provide informed consent and/or assent (all subjects)
- For subjects 16 and 17 years of age, parental/guardian consent
- Age range of 18-30 (inclusive) and able to give voluntary informed consent (Note: Subjects diagnosed with a psychotic disorder under the age of 18 will be age matched to control subjects aged 18).
- Male or Female
Who cannot join
- Unstable medical conditions
- Active seizure disorder
- Pregnant or lactating women
- Females unwilling to utilize birth control
- Implanted pacemaker, medication pump, vagal stimulator, deep brain stimulator, TENS unit, or ventriculoperitoneal shunt (because of MR studies).
- Known IQ less than 70
Show all 19Show fewer
- DSM-IV-TR diagnosis of substance dependence (with the exception of nicotine or caffeine dependence)
- Psychotic symptoms secondary to substance use
- Considered a high risk for suicidal acts - active suicidal ideation with intent to act as determined by clinical interview
- HEALTHY CONTROL SUBJECTS
- The comparison subjects will consist of 40 healthy normal volunteers recruited from the community who will be age and gender matched to subjects diagnosed with a psychotic disorder entering the NAC treatment study
- Current severe mental disorder (Schizophrenia, schizophreniform disorder, other psychotic disorders, bipolar disorder, major depressive disorder)
- Known/documented IQ < 70
- Pregnant or lactating women
- Acute, serious, or unstable medical condition
- Metallic implants or other contraindication to MRI (including but not limited to: Implanted pacemaker, medication pump, vagal stimulator, deep brain stimulator, TENS unit, or ventriculoperitoneal shunt)
- First degree relative with a psychotic disorder (i.e. schizophrenia, schizophreniform, schizoaffective, psychosis disorder NOS, substance induced psychosis, major depression with psychotic features, or bipolar disorder with psychotic features).
- Current DSM-IV-TR diagnosis of substance abuse or dependence (with the exception of nicotine or caffeine) as diagnosed within the 6 months prior to screening visit
- Known history of seizure disorder, head trauma, stroke, traumatic brain injury, significant loss of consciousness
Trial locations and contacts
2 sites in 1 country.
United States2 sites
Prevention and Recovery Center for Early Psychosis (PARC)
Indianapolis, Indiana, 46202
Indiana University Psychotic Disorders Clinic
Indianapolis, Indiana, 46222
About this study
The primary objective of this study is to determine if NAC, added to existing antipsychotic treatment, is superior to placebo for cortical erosion in patients with early stage psychosis. The primary hypothesis is that there will be significantly less cortical erosion as measured by cortical thickness, cortical volume and cortical white matter density (assessed by DTI) in patients treated for 12 months with NAC as compared to those treated with placebo. The secondary objectives of this study are to determine if 12 months of NAC add-on treatment is superior to placebo for fMRI determined working memory and semantic memory tasks, cortical MR spectroscopy measures (glutathione, N-acetylaspartate, and glutamine/glutamate levels), electrophysiologically determined attention measures (e.g., mismatch negativity, P300), symptoms, functional measures and cognitive functioning.
Read the detailed description
Schizophrenia is a severe, debilitating illness that typically begins during the teen-age years and early twenties, and worsens over time as it evolves into a chronic, life-long disorder. Existing treatments suppress psychotic symptoms but do not prevent the evolution of underlying disease processes that results in poor, long term outcomes. Recent studies have shown that progressive erosion of cortical mass occurs during the early stages of schizophrenia (1-3). The investigators hypothesize that arresting cortical erosion during the early phases of schizophrenia will prevent subsequent clinical deterioration and the descending course of illness associated with this disorder. The investigators propose to establish a research program that will assess the ability of agents with neuroprotective properties to halt cortical loss and thereby prevent subsequent clinical deterioration.
N-acetyl cysteine (NAC) is an attractive molecule for the proposed study because of two of its mechanistic properties. First, it is an established neuroprotective agent. NAC is a precursor to glutathione which is a primary detoxifier of reactive oxygen and other radical molecules which damage neuronal tissue (4-6). Glutathione deficiencies have been well documented in schizophrenia (7, 8). Second, NAC modulates glutamate release. NMDA hypofunction and altered glutamate release have been hypothesized to contribute to the cortical atrophy observed in early stage schizophrenia (9, 10). NAC has been shown to antagonize both the phencyclidine (PCP) effects of increased frontal glutamate levels and induction of social isolation in rodents (11). PCP is a pharmacological model of schizophrenia. In a controlled clinical trial of patients with chronic schizophrenia, NAC improved mismatch negativity, a pre-attentive measure of cortical information processing that has been consistently implicated in the pathophysiology of schizophrenia and has been shown to correlate with cortical erosion in early stage patients (12, 13). In a double-blind, placebo controlled clinical trial of chronic schizophrenic patients, NAC significantly improved general psychopathology scores, negative symptoms and extrapyramidal symptoms (14). NAC was well tolerated with no significant effects on any safety parameter or adverse events. The favorable tolerability of NAC has been further demonstrated in a recent study conducted at IUSM Riley Hospital in children (ages 4 to 12 years) with autism at relatively high doses (dose range of 900 to 4200 mg/day) in which there were no serious adverse events reported and NAC was well tolerated (15).
The investigators propose to determine if NAC has disease modifying potential in early stage schizophrenia. The investigators hypothesize that NAC will improve measures of cortical integrity in early stage schizophrenia and these brain effects will be related to improvements in negative symptoms and cognitive functioning. Primary outcome measures in the trials will be serial assessments of cortical integrity using magnetic resonance structural (cortical thickness, cortical volume, diffuses tensor imaging, DTI). In addition the investigators will assess the possible effects of NAC treatment on other parameters linked to cortical erosion including fMRI coupled with working memory and semantic memory tasks, MR spectroscopy (cortical glutathione, N-acetylaspartate, and glutamine/glutamate levels) and electrophysiological measures (e.g., mismatch negativity, P300). The investigators will also determine the relationship between effects of NAC on negative symptoms, positive symptoms, functional status, cognition (BACS), and safety parameters; and brain indices.
- Being tested
- N-Acetyl Cysteine, sugar pill
- Medical subject headings
- Schizophrenia, Mental Disorders, Psychotic Disorders
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
N-Acetyl CysteineDrug
NAC and matched placebo will be supplied in unmarked capsules. Each NAC capsule will contain 480 mg of NAC. Dosing will begin at 480 mg/d and titrated up by 480 mg/d each week until a maximum dose of 2880 mg/d (BID) is reached. This approximate dose was effective and well tolerated in a recent study of treatment refractory obsessive-compulsive disorder by Krystal and colleagues at Yale (16). In addition, a double-blind placebo controlled trial recently completed at IUSM Riley Hospital in children (age 4 to 12 years) with autism spectrum disorders used doses ranging from 900 mg/day to 4200 mg/day and reported no serious adverse events and found the agent well tolerated (15). Dose adjustments downward to 1920 mg/d will be permitted if tolerability issues are encountered at the maximum dose
sugar pillOther
matched placebo will be supplied in unmarked capsules. Dosing regimen will be the same as in the N-Acetyl Cysteine arm.
| Study group | Role | What they receive |
|---|---|---|
| N-Acetyl Cysteine | Experimental | NAC and matched placebo will be supplied in unmarked capsules. Each NAC capsule will contain 600 mg of NAC. Dosing will begin at 600 mg/d and titrated up over 5 weeks until a maximum dose of 3600 mg/d is reached. This approximate dose was effective and well tolerated in a recent study of treatment refractory obsessive-compulsive disorder by Krystal and colleagues at Yale (16). In addition, a double-blind placebo controlled trial recently completed at IUSM Riley Hospital in children (age 4 to 12 years) with autism spectrum disorders used doses ranging from 900 mg/day to 4200 mg/day and reported no serious adverse events and found the agent well tolerated (15). Dose adjustments downward to 1920 mg/d will be permitted if tolerability issues are encountered at the maximum dose. Receives: Drug: N-Acetyl Cysteine |
| Sugar Pill | Placebo comparator | matched placebo Receives: Other: sugar pill |
What is being measured
The primary outcome is the main question the study is designed to answer.
Cortical Thickness
We anticipate that 12 months treatment with NAC as an add-on treatment will show significantly less cortical erosion as measured by cortical thickness than treatment with placebo
Measured: 12 months
Cortical Volume
We anticipate that 12 months treatment with NAC as an add-on treatment will show a difference in cortical volume than treatment with placebo
Measured: 12 months
Secondary outcomes (8)
Working Memory
determine if 12 months of NAC add-on treatment is superior to placebo as determined by brain activity during n-back working memory task during fMRI.
Measured: Baseline and 12 months
Number of Participants With Glutamine/Glutamate Level Changes
Identify number of participants with 12 months of NAC treatment who had glutamine/glutamate level changes as measured by cortical magnetic resonance spectroscopy measures.
Measured: 12 months
Attention Measures
determine if 12 months of NAC add-on treatment is superior to placebo for attention measures (e.g., mismatch negativity, P300) as measured by electrophysiology methods. Electrophysiology measures will be recorded from a 64 channel, silver/silver-chloride scalp electrode montage.
Measured: 12 months
Symptoms of a Psychotic Disorder
Determine if 12 months of NAC add-on treatment is superior to placebo for symptom management of a psychotic disorder as assessed by the Positive and Negative Syndrome Scale (PANSS). The PANSS is a semi-structured interview, containing 30 items that assess positive, negative, and general psychopathology symptoms. Positive symptoms=7 items, negative symptoms=7 items, and general psych.=16 items. Scores for each item range from 1-absent to 7-extreme. To calculate total score, all items on the scale are summed to yield a score from 30-210,a lower score reflecting fewer symptoms. To calculate factor scores various items from positive, negative, and general psych. are summed together to yield Cognitive/Disorganized, Negative, and Positive factor scores. Cog/Disorg factor scores sum 7 items, ranging from 7-49. Neg factor scores sum 7 items, ranging from 7-49. Pos factor scores sum 8 items, ranging from 8-56. For all factor scores a lower score reflects less symptom severity.
Measured: 12 months
Cognitive Functioning
determine if 12 months of NAC add-on treatment is superior to placebo for cognitive functioning as measured by the Brief Assessment of Cognition in Schizophrenia (BACS). The BACS is a battery specifically designed to measure treatment-related changes in cognition by utilizing 6 tasks, and has alternate forms, thus minimizing practice effects. Each task generates a raw score (with a higher score indicating better performance): verbal memory 0-75; digit sequencing 0-28; token motor task 0-100; semantic\&letter fluency 0-148; symbol coding 0-110; and tower of London 0-22. The raw scores are used to generate a composite score that is calculated by summing t-scores derived by comparisons with a normative sample of 404 healthy controls. The six brief assessments' t-scores, are summed, and averaged to provide a composite t-score. The composite score min and max are between -43 and 100. A higher score indicating better cognitive performance.
Measured: Baseline and 12 months
Functional Status
determine if 12 months of NAC add-on treatment is superior to placebo for functional measures as measured by the Personal and Social Performance Scale (PSP). The PSP scale is a 100-point, single item, clinician rated scale to assess 4 domains of functioning, including personal and social relationships, socially useful activities, self care and disturbing and aggressive behaviors. A score from 0-100 is generated, with a higher score representing better performance.
Measured: Baseline and 12 months
Mismatch Negativity Voltage Differences
Determine if 12 months of NAC add-on treatment is superior to placebo for attention measures as measured by the voltage of the Mismatch Negativity (MMN) of the event-related potential. The voltage of the peak MMN response was measured at the Fz electrode site.
Measured: 12 months
Symptoms of a Psychotic Disorder
determine if 12 months of NAC add-on treatment is superior to placebo for symptom management of a psychotic disorder as assessed by the Clinical Global Impressions Severity Scale (CGI-S). The CGI-S is used for repeated evaluations of global psychopathology and is a 7 point Likert scale rating severity on a scale of 1 (normal, not ill) to 7 (very severely ill).
Measured: 12 months
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted21 Apr 2011 (estimated)
- Study startMay 2011
- Primary completionDec 2015
- Study completionDec 2015
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Posted resultsParticipant flow, outcome measures and adverse events reported by the sponsor.
- Publications (1)Papers the sponsor has linked to this study.
- Other trials for SchizophreniaStudies of the same condition, open and under way.
- More trials run by Indiana UniversityThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 4
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Double blind
- Who is masked
- Participant, Care provider
- Enrolment
- 60 participants (actual)
Sponsor and investigators
- Lead sponsor
- Indiana University
- Sponsor type
- University, hospital or other
- Collaborators
- Stanley Medical Research Institute
- Responsible party
- Principal investigator, Alan Breier, Indiana University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT01339858
- Sponsor's protocol ID
- 1008-12
- Acronym
- Breier-Stanley
- Status last verified
- Apr 2019
- First submitted
- 19 Apr 2011
- Last updated
- 8 May 2019
- Results posted
- Yes, on ClinicalTrials.gov
- Data monitoring committee
- Yes
Publications
Breier A, Liffick E, Hummer TA, Vohs JL, Yang Z, Mehdiyoun NF, Visco AC, Metzler E, Zhang Y, Francis MM. Effects of 12-month, double-blind N-acetyl cysteine on symptoms, cognition and brain morphology in early phase schizophrenia spectrum disorders. Schizophr Res. 2018 Sep;199:395-402. doi: 10.1016/j.schres.2018.03.012. Epub 2018 Mar 24.
PubMed 29588126
Study at a glance
From the registry record, last updated by the sponsor on 8 May 2019. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- The Effect of N-Acetyl Cysteine on Cortical Erosion in Early Stage Schizophrenia
- ClinicalTrials.gov ID
- NCT01339858
- Acronym / sponsor ID
- Breier-Stanley / 1008-12
- Phase
- Phase 4
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 60 participants (actual)
- Lead sponsor
- Indiana UniversityUniversity, hospital or other
- Collaborators
- Stanley Medical Research Institute
- Study start
- May 2011
- Primary completion
- Dec 2015 (actual)
- Study completion
- Dec 2015 (actual)
- First posted
- 21 Apr 2011 (estimated)
- Results
- Posted 8 May 2019
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The primary objective of this study is to determine if NAC, added to existing antipsychotic treatment, is superior to placebo for cortical erosion in patients with early stage psychosis. The primary hypothesis is that there will be significantly less cortical erosion as measured by cortical thickness, cortical volume and cortical white matter density (assessed by DTI) in patients treated for 12 months with NAC as compared to those treated with placebo. The secondary objectives of this study are to determine if 12 months of NAC add-on treatment is superior to placebo for fMRI determined working memory and semantic memory tasks, cortical MR spectroscopy measures (glutathione, N-acetylaspartate, and glutamine/glutamate levels), electrophysiologically determined attention measures (e.g., mismatch negativity, P300), symptoms, functional measures and cognitive functioning.
Detailed description
Schizophrenia is a severe, debilitating illness that typically begins during the teen-age years and early twenties, and worsens over time as it evolves into a chronic, life-long disorder. Existing treatments suppress psychotic symptoms but do not prevent the evolution of underlying disease processes that results in poor, long term outcomes. Recent studies have shown that progressive erosion of cortical mass occurs during the early stages of schizophrenia (1-3). The investigators hypothesize that arresting cortical erosion during the early phases of schizophrenia will prevent subsequent clinical deterioration and the descending course of illness associated with this disorder. The investigators propose to establish a research program that will assess the ability of agents with neuroprotective properties to halt cortical loss and thereby prevent subsequent clinical deterioration.
N-acetyl cysteine (NAC) is an attractive molecule for the proposed study because of two of its mechanistic properties. First, it is an established neuroprotective agent. NAC is a precursor to glutathione which is a primary detoxifier of reactive oxygen and other radical molecules which damage neuronal tissue (4-6). Glutathione deficiencies have been well documented in schizophrenia (7, 8). Second, NAC modulates glutamate release. NMDA hypofunction and altered glutamate release have been hypothesized to contribute to the cortical atrophy observed in early stage schizophrenia (9, 10). NAC has been shown to antagonize both the phencyclidine (PCP) effects of increased frontal glutamate levels and induction of social isolation in rodents (11). PCP is a pharmacological model of schizophrenia. In a controlled clinical trial of patients with chronic schizophrenia, NAC improved mismatch negativity, a pre-attentive measure of cortical information processing that has been consistently implicated in the pathophysiology of schizophrenia and has been shown to correlate with cortical erosion in early stage patients (12, 13). In a double-blind, placebo controlled clinical trial of chronic schizophrenic patients, NAC significantly improved general psychopathology scores, negative symptoms and extrapyramidal symptoms (14). NAC was well tolerated with no significant effects on any safety parameter or adverse events. The favorable tolerability of NAC has been further demonstrated in a recent study conducted at IUSM Riley Hospital in children (ages 4 to 12 years) with autism at relatively high doses (dose range of 900 to 4200 mg/day) in which there were no serious adverse events reported and NAC was well tolerated (15).
The investigators propose to determine if NAC has disease modifying potential in early stage schizophrenia. The investigators hypothesize that NAC will improve measures of cortical integrity in early stage schizophrenia and these brain effects will be related to improvements in negative symptoms and cognitive functioning. Primary outcome measures in the trials will be serial assessments of cortical integrity using magnetic resonance structural (cortical thickness, cortical volume, diffuses tensor imaging, DTI). In addition the investigators will assess the possible effects of NAC treatment on other parameters linked to cortical erosion including fMRI coupled with working memory and semantic memory tasks, MR spectroscopy (cortical glutathione, N-acetylaspartate, and glutamine/glutamate levels) and electrophysiological measures (e.g., mismatch negativity, P300). The investigators will also determine the relationship between effects of NAC on negative symptoms, positive symptoms, functional status, cognition (BACS), and safety parameters; and brain indices.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Double blind (participant, care provider)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| N-Acetyl Cysteine | Experimental | Drug: N-Acetyl CysteineNAC and matched placebo will be supplied in unmarked capsules. Each NAC capsule will contain 600 mg of NAC. Dosing will begin at 600 mg/d and titrated up over 5 weeks until a maximum dose of 3600 mg/d is reached. This approximate dose was effective and well tolerated in a recent study of treatment refractory obsessive-compulsive disorder by Krystal and colleagues at Yale (16). In addition, a double-blind placebo controlled trial recently completed at IUSM Riley Hospital in children (age 4 to 12 years) with autism spectrum disorders used doses ranging from 900 mg/day to 4200 mg/day and reported no serious adverse events and found the agent well tolerated (15). Dose adjustments downward to 1920 mg/d will be permitted if tolerability issues are encountered at the maximum dose. |
| Sugar Pill | Placebo comparator | Other: sugar pillmatched placebo |
Who may qualify
- Ages
- 16 to 35 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Child, Adult
Key inclusion criteria (8 listed)
- Patients with a DSM-IV diagnosis of schizophrenia, schizophreniform, schizoaffective, psychosis disorder NOS
- Age range 16-35 years
- Male or female
- Within 2 years of the first onset of psychotic symptoms that resulted in work/school/social dysfunction and/or treatment (PI will review potential subjects who have been experiencing symptoms >2 years but <5 years and will allow to enter the trial on a case-by-case basis)
- Ability to provide informed consent and/or assent (all subjects)
Key exclusion criteria (19 listed)
- Unstable medical conditions
- Active seizure disorder
- Pregnant or lactating women
- Females unwilling to utilize birth control
- Implanted pacemaker, medication pump, vagal stimulator, deep brain stimulator, TENS unit, or ventriculoperitoneal shunt (because of MR studies).
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| N-Acetyl CysteineNAC and matched placebo will be supplied in unmarked capsules. Each NAC capsule will contain 480 mg of NAC. Dosing will begin at 480 mg/d and titrated up by 480 mg/d each week until a maximum dose of 2880 mg/d (BID) is reached. This approximate dose was effective and well tolerated in a recent study of treatment refractory obsessive-compulsive disorder by Krystal and colleagues at Yale (16). In addition, a double-blind placebo controlled trial recently completed at IUSM Riley Hospital in children (age 4 to 12 years) with autism spectrum disorders used doses ranging from 900 mg/day to 4200 mg/day and reported no serious adverse events and found the agent well tolerated (15). Dose adjustments downward to 1920 mg/d will be permitted if tolerability issues are encountered at the maximum dose | Drug | N-Acetyl Cysteine |
| sugar pillmatched placebo will be supplied in unmarked capsules. Dosing regimen will be the same as in the N-Acetyl Cysteine arm. | Other | Sugar Pill |
Primary outcome
Cortical Thickness
Time frame: 12 months
We anticipate that 12 months treatment with NAC as an add-on treatment will show significantly less cortical erosion as measured by cortical thickness than treatment with placebo
Cortical Volume
Time frame: 12 months
We anticipate that 12 months treatment with NAC as an add-on treatment will show a difference in cortical volume than treatment with placebo
8 secondary outcomes
Working Memory
Time frame: Baseline and 12 months
Number of Participants With Glutamine/Glutamate Level Changes
Time frame: 12 months
Attention Measures
Time frame: 12 months
Symptoms of a Psychotic Disorder
Time frame: 12 months
Cognitive Functioning
Time frame: Baseline and 12 months
Functional Status
Time frame: Baseline and 12 months
Mismatch Negativity Voltage Differences
Time frame: 12 months
Symptoms of a Psychotic Disorder
Time frame: 12 months
Results and safety
Loading the posted results from ClinicalTrials.gov…
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 8 May 2019.
- Posted resultsParticipant flow, baseline, all outcome measures and adverse events.
- Derived from this study: PubMed 29588126Breier A, Liffick E, Hummer TA, Vohs JL, Yang Z, Mehdiyoun NF, Visco AC, Metzler E, Zhang Y, Francis MM. Effects of 12-month, double-blind N-acetyl cysteine on symptoms, cognition and brain morphology in early phase schizophrenia spectrum disorders. Schizophr Res. 2018 Sep;199:395-402. doi: 10.1016/j.schres.2018.03.012. Epub 2018 Mar 24.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
2 sites in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 4 study testing N-Acetyl Cysteine and sugar pill in people with Schizophrenia and Psychotic Disorder NOS, run by Indiana University at 2 sites in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 8 inclusion and 19 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 8 May 2019. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 2 sites in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 4 studies take place after a treatment is approved, to learn more about its long-term benefits and risks in everyday use.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
Yes. Results are posted in the registry (first posted 8 May 2019). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Cortical Thickness (time frame: 12 months). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT01339858, which also lists 1 linked publication.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 8 May 2019.