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

This study has been withdrawn prior to enrollment.
Information provided by:
University Health Network, Toronto Identifier:
First received: October 27, 2008
Last updated: November 12, 2009
Last verified: November 2009

This study will examine the effects of add-on sildenafil to bosentan monotherapy in patients with Pulmonary Arterial Hypertension. Patients on bosentan monotherapy will be followed every 6 months to assess if they have met the pre-defined treatment goals. If a patient fails to achieve these treatment goals or fails to maintain them, sildenafil will be added to their existing bosentan monotherapy. Patients will be assessed 6 months after start of combination therapy for changes in 6MWT, Borg dyspnea scale, WHO functional class, quality of life.

Condition Intervention Phase
Hypertension, Pulmonary
Drug: Sildenafil
Phase 3

Study Type: Interventional
Official Title: Addition of Sildenafil to Bosentan Monotherapy in Patients With Pulmonary Arterial Hypertension (PAH)

Resource links provided by NLM:

Further study details as provided by University Health Network, Toronto:

Arms Assigned Interventions
Active Comparator: Sildenafil Drug: Sildenafil


Ages Eligible for Study:   18 Years and older
Genders Eligible for Study:   Both

Inclusion & Exclusion Criteria

  Contacts and Locations
No Contacts or Locations Provided
  More Information

No publications provided Identifier: NCT00780728     History of Changes
Other Study ID Numbers: UHNOHI
Study First Received: October 27, 2008
Last Updated: November 12, 2009
Health Authority: Canada: Health Canada

Additional relevant MeSH terms:
Hypertension, Pulmonary
Lung Diseases
Respiratory Tract Diseases
Vascular Diseases
Cardiovascular Diseases
Antihypertensive Agents
Cardiovascular Agents
Therapeutic Uses
Pharmacologic Actions
Vasodilator Agents
Phosphodiesterase 5 Inhibitors
Phosphodiesterase Inhibitors
Enzyme Inhibitors
Molecular Mechanisms of Pharmacological Action processed this record on April 23, 2014