# Study Evaluating the Addition of Sildenafil to Bosentan Therapy in Pulmonary Arterial Hypertension

> **NCT00780728** · PHASE3 · WITHDRAWN · sponsor: **University Health Network, Toronto**

## Conditions studied

- Hypertension, Pulmonary

## Interventions

- **DRUG:** Sildenafil

## Key facts

- **NCT ID:** NCT00780728
- **Lead sponsor:** University Health Network, Toronto
- **Sponsor class:** OTHER
- **Phase:** PHASE3
- **Study type:** INTERVENTIONAL
- **Status:** WITHDRAWN
- **Start date:** —
- **Primary completion:** —
- **Final completion:** —
- **Target enrollment:** — (—)
- **Last updated:** 2009-11-13


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT00780728

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT00780728, "Study Evaluating the Addition of Sildenafil to Bosentan Therapy in Pulmonary Arterial Hypertension". Retrieved via AI Analytics 2026-06-02 from https://api.ai-analytics.org/clinical/NCT00780728. Licensed CC0.

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