Phase III Clinical Worsening Study of UT-15C in Subjects With PAH Receiving Background Oral Monotherapy — FREEDOM-EV  

Pulmonary Arterial Hypertension Clinical Trial

Official title: A Phase III, International, Multi-Center, Randomized, Double-Blind, Placebo-Controlled, Clinical Worsening Study of UT-15C in Subjects With Pulmonary Arterial Hypertension Receiving Background Oral Monotherapy

Status Completed

Clinical Trial Summary

This is an international, multicenter, randomized, double-blind, placebo-controlled, event driven study in subjects with pulmonary arterial hypertension.

Clinical Trial Description

Study TDE-PH-310 is an international, multicenter, randomized (1:1 oral treprostinil (UT-15C): placebo), double-blind, placebo-controlled study in subjects with pulmonary arterial hypertension (PAH) who are receiving background oral monotherapy for PAH for at least 30 days at randomization. Subjects are randomly allocated to receive oral treprostinil extended-release tablets or placebo by a stratified randomization by type of background therapy (Strata 1: phosphodiesterase type 5 inhibitor [PDE5-I] or soluble guanylate cyclase [sGC] stimulator; Strata 2: endothelin receptor antagonist [ERA]. Subjects are also stratified by baseline 6-minute walk distance (6MWD) less than or equal to 350 m or greater than 350 m. Subjects receive their first dose of study drug (0.125 mg) or matching placebo on the day of randomization. Oral dosing of study drug is continued at 0.125 mg 3 times daily (TID; every 6 to 8 hours) with food. The dose (or matching placebo) is titrated throughout the study up to a maximum dose of 12 mg TID to reach and maintain a tolerated dosing regimen that provided optimal clinical benefit. Once randomized, subjects return for study visits every 4 weeks for the first 12 weeks, then every 12 weeks for the duration of the study. Subjects continue in the study until experiencing clinical worsening, the number of adjudicated events necessary for study closure occurr, or prematurely discontinue participation in the study for any reason other than protocol-specified clinical worsening. At each scheduled visit, subjects undergo efficacy assessments for clinical worsening, exercise capacity (6MWD and Borg dyspnea score), WHO functional class (FC), and plasma N-Terminal pro-brain natriuretic peptide (NT-proBNP). Subjects could participate in an optional hemodynamic sub-study (assessed by RHC). Safety assessments consist of adverse events (AEs), physical examinations, vital signs, 12-lead electrocardiograms (ECGs), and clinical laboratory parameters. Patients who complete all required assessments are eligible to enter a long-term, open-label, extension study (TDE-PH-311). ;

Related Conditions & MeSH terms

• Familial Primary Pulmonary Hypertension
• Hypertension
• Pulmonary Arterial Hypertension

• NCT number: NCT01560624
• Study type: Interventional
• Source: United Therapeutics
• Status: Completed
• Phase: Phase 3
• Start date: June 26, 2012
• Completion date: June 24, 2018