# Study For Which Treatment, Tadalafil or Sildenafil, is Preferred For Problems Getting or Maintaining an Erection

> **NCT00547092** · PHASE4 · COMPLETED · sponsor: **Eli Lilly and Company** · enrollment: 386 (actual)

## Conditions studied

- Impotence

## Interventions

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

## Key facts

- **NCT ID:** NCT00547092
- **Lead sponsor:** Eli Lilly and Company
- **Sponsor class:** INDUSTRY
- **Phase:** PHASE4
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2003-10
- **Primary completion:** —
- **Final completion:** 2004-11
- **Target enrollment:** 386 (ACTUAL)
- **Last updated:** 2007-10-22

## Collaborators

- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT00547092

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT00547092, "Study For Which Treatment, Tadalafil or Sildenafil, is Preferred For Problems Getting or Maintaining an Erection". Retrieved via AI Analytics 2026-07-04 from https://api.ai-analytics.org/clinical/NCT00547092. Licensed CC0.

---

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