Medical Information Only. Always consult your healthcare provider before enrolling in any clinical trial.

NCT02164981 · ClinicalTrials.gov registry record · Phase 2

A Proof of Concept Study of Intravenous Sodium Nitroprusside in Adults With Symptomatic Schizophrenia

A Phase 2 study, sponsored by Massachusetts General Hospital.

Completed
Registry status
Phase 2
Development phase
60
Enrollment target

NCT02164981: Completed Phase 2 study, sponsored by Massachusetts General Hospital.

NCT02164981 is a Phase 2 study that has completed, run by Massachusetts General Hospital. The registered enrollment target is 60 participants, below the 133-participant average among 30,622 other Phase 2 trials with a reported enrollment target (55% lower). According to ClinicalTrials.gov, the official US trial registry.

View on ClinicalTrials.gov ↗

View your shortlist → Add completion date to calendar (.ics) →

The verdict

NCT02164981, a Phase 2 study, has completed, sponsored by Massachusetts General Hospital.

COMPLETED
Registry status
Phase 2
Development phase
60 participants
Enrollment target

Study Summary

The primary objective of this study is to investigate whether a single infusion of intravenous sodium nitroprusside (0.5 μg/kg/min for 4 hours) is superior to placebo (5% dextrose solution) at in treating positive and negative symptoms of schizophrenia

Primary Outcome

The Positive and Negative Syndrome Scale (PANSS) will be used to measure symptom severity in this trial. PANSS is a 30-item questionnaire used to evaluate schizophrenia symptoms, based on the clinical interview as well as reports of family members or primary care hospital workers. PANSS consists of Positive scale (7 items), Negative scale (7 items), and General Psychopathological scale (16 items) sections. Each item (symptom) will be scored on a 7-point scale with higher scores representing incr

Interventions

  • OTHER Placebo
  • DRUG sodium nitroprusside

Trial Details

FieldValue
Enrollment Target 60 participants
Start Date 2015-05-01
Est. Completion 2017-04-05
Phase Phase 2
Massachusetts General Hospital

2,032 total trials

What the finished NCT02164981 record still lists

NCT02164981 is an interventional study that assigns participants to a tested intervention. The registry caps enrollment at 60 participants, a relatively small participant target, below the 133-participant average among 30,622 other Phase 2 trials with a reported enrollment target (55% lower).

The record links to 0 conditions, and to 2 interventions - of which Placebo is the first listed.

NCT02164981 does not publish any study locations in the registry export this page uses.

Frequently Asked Questions

What is clinical trial NCT02164981 about?

NCT02164981 is a clinical study titled "A Proof of Concept Study of Intravenous Sodium Nitroprusside in Adults With Symptomatic Schizophrenia". The primary objective of this study is to investigate whether a single infusion of intravenous sodium nitroprusside (0.5 μg/kg/min for 4 hours) is superior to placebo (5% dextrose solution) at in treating positive and negative symptoms of schizophrenia

What is the current status of trial NCT02164981?

This trial is currently completed. It is a Phase 2 study. The enrollment target is 60 participants. The study started on 2015-05-01. Estimated completion is 2017-04-05.

What interventions are being tested in trial NCT02164981?

The interventions under investigation include: Placebo (OTHER), sodium nitroprusside (DRUG).

Who is sponsoring clinical trial NCT02164981?

This trial is sponsored by Massachusetts General Hospital, which has 2,032 total clinical trials registered on ClinicalTrials.gov.

How this trial's enrollment target compares

Where NCT02164981's enrollment target sits among peer trials

60 1027th of 2000 higher than 868 of 2,000 other Phase 2 trials

participants (enrollment target), bucketed by value

Each bar is a band; taller bars hold more other Phase 2 trials. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.

Source ClinicalTrials.gov registry export · 2026-08-08

Nationwide trials with similar profiles

Cross-condition peers matched on enrollment target and registry start date, not the same-condition list above.

Similar enrollment target

  • NCT00576069 · 60 participants

    Mechanism(s)of Airflow Limitation in Moderate-severe Persistent Asthma

  • NCT01297400 · 60 participants · Phase 2

    Phase 2 Pilot Study of the Safety and Efficacy of Topical MW-III in Thermal Burns

  • NCT01734122 · 60 participants

    Stereotactic Radiosurgery for Essential Tremor and Parkinsonian Tremor

  • NCT01804634 · 60 participants · Phase 2

    Reduced Intensity Haploidentical BMT for High Risk Solid Tumors

Similar registry start date

  • NCT05962346 · started 2026-12 · NA

    Fetal Endoscopic Tracheal Occlusion for Congenital Diaphragmatic Hernia

  • NCT07125183 · started 2026-12 · Phase 2

    Study on Efficacy and Tolerability of Weekly Doxorubicin in Elderly Patients With Advanced or Metastatic Leiomyosarcoma

  • NCT07292298 · started 2026-11 · Phase 2

    Phase 2 Single-Arm Rectal Cancer Brachytherapy for Patients With Low-Lying Residual Adenocarcinoma After Total Neoadjuvant Therapy to Improve Organ Preservation Rates

  • NCT04263285 · started 2026-10 · NA

    Treatment of Depression Post-SCI

Source: ClinicalTrials.gov NCT02164981, the US trial registry maintained by the National Library of Medicine. NCT02164981 (small enrollment · none site footprint · completed) retrieved and formatted by PlainTrial, see methodology.