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Sitaxsentan Efficacy And Safety Trial With A Randomized Prospective Assessment Of Adding Sildenafil (SR-PAAS)
This study has been terminated.
(Safety Issue: The trial was prematurely terminated on Dec 9, 2010, due to safety concerns, specifically new emerging evidence of hepatic injury.)
Sponsor:
Pfizer
Information provided by (Responsible Party):
Pfizer
ClinicalTrials.gov Identifier:
NCT00795639
First received: November 20, 2008
Last updated: March 4, 2015
Last verified: March 2015
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Purpose
This protocol is for subjects with pulmonary arterial hypertension and is the first of 3 studies forming the Sitaxsentan efficacy and safety trial with Randomized Prospective Assessment of Adding Sildenafil (SR-PAAS) program.
| Condition | Intervention | Phase |
|---|---|---|
| Pulmonary Arterial Hypertension Pulmonary Hypertension | Drug: Sitaxsentan Drug: Placebo | Phase 3 |
| Study Type: | Interventional |
| Study Design: | Allocation: Randomized Intervention Model: Parallel Assignment Masking: Double Blind (Participant, Investigator) Primary Purpose: Treatment |
| Official Title: | A Phase 3, Multi-Center, Randomized, Double-Blind, Placebo-Controlled, Safety And Efficacy Study Of Sitaxsentan Sodium In Subjects With Pulmonary Arterial Hypertension |
Resource links provided by NLM:
Further study details as provided by Pfizer:
Primary Outcome Measures:
- Change From Baseline in Total Distance Walked During 6 Minute Walk Distance (6MWD) at Week 12 [ Time Frame: Baseline/Day 1 and Week 12 ]6 MWD was the distance that a participant could walk in 6 minutes. Participants were asked to perform the test at a pace that was comfortable to them, with as many breaks as they needed. Continuous pulse oximetry was conducted during the test for safety. Change is Week 12 results minus baseline results.
Secondary Outcome Measures:
- Number of Participants With Change From Baseline in World Health Organization (WHO) Functional Classification at Weeks 4, 8 and 12 [ Time Frame: Baseline, Weeks 4, 8 and 12 or Early Termination (ET) ]WHO functional classification for PAH ranges from Class I (no limitation in physical activity, no dyspnea with normal activity) to Class IV (cannot perform a physical activity without any symptoms, dyspnea at rest). Improvement = reduction in functional class, deterioration = increase in functional class, no change = no change in functional class.
- Time to Clinical Worsening (TTCW) [ Time Frame: Baseline, Weeks 4, 8 and 12 or ET ]TTCW defined as the number of days between first dose of study drug and the occurrence of a predefined clinical worsening event. Predefined clinical worsening events included: hospitalization for worsening PAH, on-study death, heart-lung or lung transplant, atrial septostomy or withdrawal due to the addition of any chronic medications for the treatment of worsening PAH.
| Enrollment: | 183 |
| Study Start Date: | December 2008 |
| Study Completion Date: | March 2011 |
| Primary Completion Date: | March 2011 (Final data collection date for primary outcome measure) |
| Arms | Assigned Interventions |
|---|---|
|
Experimental: Sitaxsentan
Monotherapy
|
Drug: Sitaxsentan
Sitaxsentan = 100 mg tablet administered orally, once daily
|
|
Placebo Comparator: Sitaxsentan Placebo
Monotherapy
|
Drug: Placebo
Sitaxsentan Placebo = 1 tablet administered orally, once daily
Other Name: Sitaxsentan Placebo
|
Eligibility| Ages Eligible for Study: | 16 Years to 80 Years (Child, Adult, Senior) |
| Sexes Eligible for Study: | All |
| Accepts Healthy Volunteers: | No |
Criteria
Inclusion Criteria:
- Current diagnosis of symptomatic pulmonary arterial hypertension (PAH) classified by one of the following: idiopathic arterial hypertension (IPAH), primary pulmonary hypertension (PPH), familial pulmonary arterial hypertension (FPAH) or pulmonary arterial hypertension (PAH) associated with connective tissue diseases. Has WHO functional class III symptoms.
Exclusion Criteria:
- Previous exposure to an endothelin receptor antagonist (ETRA) such as sitaxsentan, bosentan or ambrisentan.
Contacts and Locations
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Please refer to this study by its ClinicalTrials.gov identifier: NCT00795639
Show 85 Study Locations
Please refer to this study by its ClinicalTrials.gov identifier: NCT00795639
Show 85 Study Locations
Sponsors and Collaborators
Pfizer
Investigators
| Study Director: | Pfizer CT.gov Call Center | Pfizer |
More Information
Additional Information:
| Responsible Party: | Pfizer |
| ClinicalTrials.gov Identifier: | NCT00795639 History of Changes |
| Other Study ID Numbers: |
B1321001 |
| Study First Received: | November 20, 2008 |
| Results First Received: | January 30, 2012 |
| Last Updated: | March 4, 2015 |
Keywords provided by Pfizer:
|
Sitaxsentan endothelin receptor antagonist |
Additional relevant MeSH terms:
|
Hypertension Hypertension, Pulmonary Familial Primary Pulmonary Hypertension Vascular Diseases Cardiovascular Diseases |
Lung Diseases Respiratory Tract Diseases Sitaxsentan Endothelin Receptor Antagonists Molecular Mechanisms of Pharmacological Action |
ClinicalTrials.gov processed this record on July 21, 2017