# L-arginine Study for Persistent Symptoms of Schizophrenia

> **NCT04054973** · PHASE2 · WITHDRAWN · sponsor: **University of Massachusetts, Worcester**

## Conditions studied

- Schizo Affective Disorder
- Schizophrenia

## Interventions

- **DRUG:** L-arginine
- **DRUG:** Sapropterin Dihydrochloride

## Key facts

- **NCT ID:** NCT04054973
- **Lead sponsor:** University of Massachusetts, Worcester
- **Sponsor class:** OTHER
- **Phase:** PHASE2
- **Study type:** INTERVENTIONAL
- **Status:** WITHDRAWN
- **Start date:** 2019-09-11
- **Primary completion:** 2021-12-31
- **Final completion:** 2021-12-31
- **Target enrollment:** 0 (ACTUAL)
- **Why stopped:** Study was unable to be started due to unavailability of study medication.
- **Last updated:** 2022-01-20


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04054973

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04054973, "L-arginine Study for Persistent Symptoms of Schizophrenia". Retrieved via AI Analytics 2026-07-19 from https://api.ai-analytics.org/clinical/NCT04054973. Licensed CC0.

---

*[Clinical trials dataset](/datasets/clinical-trials) · CC0 1.0*