# To Determine How Different Doses of Tadalafil Work on Getting and Keeping an Erection 26 or 36 Hours After Taking

> **NCT00547508** · PHASE3 · COMPLETED · sponsor: **Eli Lilly and Company** · enrollment: 485 (actual)

## Conditions studied

- Impotence

## Interventions

- **DRUG:** tadalafil
- **DRUG:** placebo
- **DRUG:** tadalafil
- **DRUG:** tadalafil
- **DRUG:** tadalafil
- **DRUG:** placebo

## Key facts

- **NCT ID:** NCT00547508
- **Lead sponsor:** Eli Lilly and Company
- **Sponsor class:** INDUSTRY
- **Phase:** PHASE3
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2002-10
- **Primary completion:** —
- **Final completion:** 2003-09
- **Target enrollment:** 485 (ACTUAL)
- **Last updated:** 2007-10-22

## Collaborators

- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT00547508

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT00547508, "To Determine How Different Doses of Tadalafil Work on Getting and Keeping an Erection 26 or 36 Hours After Taking". Retrieved via AI Analytics 2026-05-24 from https://api.ai-analytics.org/clinical/NCT00547508. Licensed CC0.

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