# Study to Determine a Preference Between Sildenafil or Tadalafil Treatment for Problems Getting an Erection

> **NCT00547352** · PHASE4 · COMPLETED · sponsor: **Eli Lilly and Company** · enrollment: 160 (actual)

## Conditions studied

- Impotence

## Interventions

- **DRUG:** tadalafil
- **DRUG:** sildenafil

## Key facts

- **NCT ID:** NCT00547352
- **Lead sponsor:** Eli Lilly and Company
- **Sponsor class:** INDUSTRY
- **Phase:** PHASE4
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2004-06
- **Primary completion:** —
- **Final completion:** 2005-06
- **Target enrollment:** 160 (ACTUAL)
- **Last updated:** 2007-10-22

## Collaborators

- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT00547352

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT00547352, "Study to Determine a Preference Between Sildenafil or Tadalafil Treatment for Problems Getting an Erection". Retrieved via AI Analytics 2026-05-24 from https://api.ai-analytics.org/clinical/NCT00547352. Licensed CC0.

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