# Acute Effects of Preladenant (SCH 420814) on Dyskinesia and Parkinsonism in Levodopa Treated Participants (P05550)

> **NCT00845000** · PHASE1 · COMPLETED · sponsor: **Merck Sharp & Dohme LLC** · enrollment: 12 (actual)

## Conditions studied

- Parkinson Disease

## Interventions

- **DRUG:** SCH 420814 10 mg
- **DRUG:** SCH 420814 100 mg
- **DRUG:** Placebo
- **DRUG:** Levodopa
- **DRUG:** Carbidopa

## Key facts

- **NCT ID:** NCT00845000
- **Lead sponsor:** Merck Sharp & Dohme LLC
- **Sponsor class:** INDUSTRY
- **Phase:** PHASE1
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2009-04-21
- **Primary completion:** 2010-04-30
- **Final completion:** 2010-05-14
- **Target enrollment:** 12 (ACTUAL)
- **Last updated:** 2018-11-07

## Collaborators

- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT00845000

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT00845000, "Acute Effects of Preladenant (SCH 420814) on Dyskinesia and Parkinsonism in Levodopa Treated Participants (P05550)". Retrieved via AI Analytics 2026-05-25 from https://api.ai-analytics.org/clinical/NCT00845000. Licensed CC0.

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