Sildenafil to Increase Exercise Capacity in Individuals With Idiopathic Pulmonary Fibrosis and Pulmonary Hypertension

Hypertension, Pulmonary Clinical Trial

Official title: Sildenafil Treatment in Patients With Idiopathic Pulmonary Fibrosis and Pulmonary Hypertension - a Pilot Cross-over Study

Status Completed

Clinical Trial Summary

Idiopathic pulmonary fibrosis (IPF) is a chronic lung disease that affects an individual's ability to breathe. Currently, no medications can reverse the damage to the lungs caused by IPF, but individuals are encouraged to engage in moderate exercise to strengthen lung function. This study will evaluate the effectiveness of sildenafil at improving exercise tolerance and breathing difficulties in individuals with IPF.

Clinical Trial Description

IPF is a disease that damages the air sacs in the lungs and leads to widespread and permanent scarring of lung tissue. Individuals with IPF may experience breathing difficulties, cough, chest pain, and a decreased exercise capacity. There is no cure for this disease, and individuals usually die within 3 to 5 years. It is recommended that individuals with IPF engage in moderate exercise, as this can help maintain strength and improve lung function. Many individuals with IPF also suffer from pulmonary hypertension, which is high blood pressure in the arteries leading to the lungs. Sildenafil, a medication currently used to treat pulmonary hypertension, increases blood flow to the lungs and enhances gas exchange within the lungs. The purpose of this study is to evaluate the effectiveness of sildenafil at improving exercise tolerance and breathing difficulties in individuals with IPF and pulmonary hypertension.

This 3-week study will enroll individuals with IPF and pulmonary hypertension. Study visits will occur at baseline, and Weeks 1 and 2. At the baseline visit, participants will perform a 6-minute walk test, which will measure the distance walked in a 6-minute period. Oxygen levels will be measured prior to and during the test, and standardized questionnaires will be completed to assess breathing difficulties. A second 6-minute walk test will be performed 1 hour following the first test. At the Week 1 visit, participants will be randomly assigned to receive a single dose of either 50 mg of sildenafil or placebo. One hour after receiving the medication, they will complete another 6-minute walk test. The Week 2 visit will be identical to the Week 1 visit, except participants who received sildenafil at Week 1 will receive placebo at Week 2, and vice versa. ;

Study Design

Allocation: Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Crossover Assignment, Masking: Double-Blind, Primary Purpose: Treatment

Related Conditions & MeSH terms

• Fibrosis
• Hypertension
• Hypertension, Pulmonary
• Idiopathic Interstitial Pneumonias
• Idiopathic Pulmonary Fibrosis
• Pulmonary Fibrosis

• NCT number: NCT00352482
• Study type: Interventional
• Source: National Heart, Lung, and Blood Institute (NHLBI)
• Status: Completed
• Phase: Phase 2
• Start date: November 2004
• Completion date: July 2007