# The Role of the Noradrenergic System in the Nonmotor Symptoms of Parkinson's Disease

> **NCT04346394** · EARLY_PHASE1 · WITHDRAWN · sponsor: **Nathaniel M. Robbins**

## Conditions studied

- Parkinson Disease

## Interventions

- **DRUG:** Yohimbine HCl

## Key facts

- **NCT ID:** NCT04346394
- **Lead sponsor:** Nathaniel M. Robbins
- **Sponsor class:** OTHER
- **Phase:** EARLY_PHASE1
- **Study type:** INTERVENTIONAL
- **Status:** WITHDRAWN
- **Start date:** 2021-05-11
- **Primary completion:** 2023-08-01
- **Final completion:** 2023-08-01
- **Target enrollment:** 0 (ACTUAL)
- **Why stopped:** COVID-19
- **Last updated:** 2023-08-23


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04346394

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04346394, "The Role of the Noradrenergic System in the Nonmotor Symptoms of Parkinson's Disease". Retrieved via AI Analytics 2026-05-28 from https://api.ai-analytics.org/clinical/NCT04346394. Licensed CC0.

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