# A Study for Patients With Erectile Dysfunction to Test Whether Tadalafil Taken Once a Day Can Better Improve Psychological Outcomes.

> **NCT00734604** · PHASE3 · COMPLETED · sponsor: **Eli Lilly and Company** · enrollment: 378 (actual)

## Conditions studied

- Erectile Dysfunction

## Interventions

- **DRUG:** tadalafil once a day [T(OaD)]
- **DRUG:** sildenafil citrate as needed [S(PRN)]
- **DRUG:** tadalafil as needed [T(PRN)]

## Key facts

- **NCT ID:** NCT00734604
- **Lead sponsor:** Eli Lilly and Company
- **Sponsor class:** INDUSTRY
- **Phase:** PHASE3
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2008-08
- **Primary completion:** 2009-09
- **Final completion:** 2009-09
- **Target enrollment:** 378 (ACTUAL)
- **Last updated:** 2010-11-18


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT00734604

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT00734604, "A Study for Patients With Erectile Dysfunction to Test Whether Tadalafil Taken Once a Day Can Better Improve Psychological Outcomes.". Retrieved via AI Analytics 2026-05-26 from https://api.ai-analytics.org/clinical/NCT00734604. Licensed CC0.

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