# Interaction of Caffeine and Hydration on Voice

> **NCT01435837** · EARLY_PHASE1 · COMPLETED · sponsor: **Southern Illinois University Carbondale** · enrollment: 80 (actual)

## Conditions studied

- Voice Disorders

## Interventions

- **DRUG:** C2 (200mg of caffeine; 1/2 L of water)
- **DRUG:** C3(200mg of caffeine; 1 L of water)
- **DRUG:** C1 (200mg of caffeine, no water)
- **DRUG:** Placebo (no caffeine, no water).

## Key facts

- **NCT ID:** NCT01435837
- **Lead sponsor:** Southern Illinois University Carbondale
- **Sponsor class:** OTHER
- **Phase:** EARLY_PHASE1
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2010-10
- **Primary completion:** 2013-05
- **Final completion:** 2013-05
- **Target enrollment:** 80 (ACTUAL)
- **Last updated:** 2013-06-11


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT01435837

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT01435837, "Interaction of Caffeine and Hydration on Voice". Retrieved via AI Analytics 2026-06-01 from https://api.ai-analytics.org/clinical/NCT01435837. Licensed CC0.

---

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