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Efficacy and Safety of Oral Bosentan in Pulmonary Arterial Hypertension Class II

A Randomized, Double-blind, Placebo-controlled, Multicenter Study to Assess the Efficacy, Safety, and Tolerability of Bosentan in Patients With Mildly Symptomatic Pulmonary Arterial Hypertension (PAH)

Status
Completed
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT00091715
Enrollment
185
Registered
2004-09-20
Start date
2004-04-30
Completion date
2011-02-28
Last updated
2011-08-30

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Pulmonary Hypertension

Keywords

Pulmonary arterial hypertension, PAH, PPH, bosentan, early

Brief summary

The present trial investigates a possible use of oral bosentan, which is currently approved for the treatment of symptoms of pulmonary arterial hypertension (PAH) Class III and IV, to patients suffering from PAH Class II.

Interventions

DRUGbosentan

65 mg tablet twice a day for 4 weeks followed by 125 mg tablet twice a day until end of study

DRUGplacebo

placebo for 6 months followed by an open-label period

Sponsors

Actelion
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)

Eligibility

Sex/Gender
ALL
Age
12 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* PAH NYHA Class II * Significant elevation of mean pulmonary arterial pressure * Significant elevation of pulmonary vascular resistance at rest * Limited 6-minute walk distance

Exclusion criteria

* PAH secondary to portal hypertension, complex congenital heart disease or reverse shunt * Restrictive or obstructive lung disease * Significant vasoreactivity * Treatments for PAH (within 4 weeks of randomization)

Design outcomes

Primary

MeasureTime frame
exercise capacityBaseline to end of study
cardiac hemodynamicsBaseline to end of study

Countries

Australia, Austria, Belgium, Canada, China, Czechia, France, Germany, Italy, Netherlands, Spain, Switzerland, United Kingdom, United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Apr 5, 2026