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An Open Trial of Allopurinol in Patients With Poorly Responsive Schizophrenia

An Open Trial of Allopurinol in Patients With Poorly Responsive Schizophrenia

Status
Completed
Phases
NA
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT00823199
Enrollment
10
Registered
2009-01-15
Start date
2005-11-30
Completion date
2008-08-31
Last updated
2018-08-21

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Schizophrenia

Brief summary

This is a four week open label trial of ALLOPURINOL to the treatment regime of ten (10) poorly responsive patients with schizophrenia, monitoring their response and side-effects. No change in medication is required.

Interventions

DRUGAllopurinal

300mg once daily by mouth for four weeks

Sponsors

Bronx Psychiatric Center
Lead SponsorOTHER_GOV

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to 65 Years
Healthy volunteers
No

Inclusion criteria

* Subjects with schizophrenia and poor response (no prospect of discharge because of symptoms)

Exclusion criteria

* Over 65 * Renal or liver disease * Diabetes * Hypertension * Taking thiazides or ACE inhibitors

Design outcomes

Primary

MeasureTime frameDescription
Change in Positive and Negative Syndrome Scale (PANSS) Measures Symptoms of Schizophreniabaseline and 4 weeksSymptom scale Score 30 (best, no symptoms of schizophrenia) to 210 (worst)

Secondary

MeasureTime frameDescription
Simpson Angus Scale for Parkinsonismbaseline and 4 weeksMeasures drug induced parkinsonism, score 0 (best, no Parkinsonism) to 36 (worst)

Participant flow

Recruitment details

Ten subjects were recruited, in-patients in a State Hospital, between 2005 and 2008

Participants by arm

ArmCount
Group 1
All participants
10
Total10

Withdrawals & dropouts

PeriodReasonFG000
Overall StudyWithdrawal by Subject2

Baseline characteristics

CharacteristicGroup 1
Age, Categorical
<=18 years
0 Participants
Age, Categorical
>=65 years
0 Participants
Age, Categorical
Between 18 and 65 years
10 Participants
Age, Continuous38 years
STANDARD_DEVIATION 9.3
Region of Enrollment
United States
10 participants
Sex: Female, Male
Female
2 Participants
Sex: Female, Male
Male
8 Participants

Adverse events

Event typeEG000
affected / at risk
deaths
Total, all-cause mortality
— / —
other
Total, other adverse events
0 / 10
serious
Total, serious adverse events
0 / 10

Outcome results

Primary

Change in Positive and Negative Syndrome Scale (PANSS) Measures Symptoms of Schizophrenia

Symptom scale Score 30 (best, no symptoms of schizophrenia) to 210 (worst)

Time frame: baseline and 4 weeks

Population: Two subjects withdrew before the first week's evaluation

ArmMeasureGroupValue (MEAN)Dispersion
Allopurinal TreatmentChange in Positive and Negative Syndrome Scale (PANSS) Measures Symptoms of SchizophreniaBaseline95 scores on a scaleStandard Deviation 22
Allopurinal TreatmentChange in Positive and Negative Syndrome Scale (PANSS) Measures Symptoms of SchizophreniaEnd75 scores on a scaleStandard Deviation 17
Secondary

Simpson Angus Scale for Parkinsonism

Measures drug induced parkinsonism, score 0 (best, no Parkinsonism) to 36 (worst)

Time frame: baseline and 4 weeks

ArmMeasureGroupValue (MEAN)Dispersion
Allopurinal TreatmentSimpson Angus Scale for ParkinsonismBaseline0.37 score on scaleStandard Deviation 0.74
Allopurinal TreatmentSimpson Angus Scale for ParkinsonismEnd1.75 score on scaleStandard Deviation 3.1
Post Hoc

Uric Acid Level

Time frame: Baseline and 4 weeks

Population: 2 subjects had missing data

ArmMeasureGroupValue (MEAN)Dispersion
Allopurinal TreatmentUric Acid LevelBaseline5.9 mg/dLStandard Deviation 1.7
Allopurinal TreatmentUric Acid LevelEnd3.8 mg/dLStandard Deviation 0.7

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026