19
Participants
Start Date
October 31, 2015
Primary Completion Date
May 31, 2017
Study Completion Date
May 31, 2017
Sildenafil
During the course of the study, patients will receive 4 weeks of therapy: 28 days of placebo orally t.i.d. or 28 days of days of sildenafil orally t.i.d. Dosing of sildenafil will be escalated after the first week (20 mg orally t.i.d for the first week, then subjects will take 40 mg orally t.i.d. for 3 weeks). Patients not tolerating dose escalation will be discontinued from the study.
Placebo
Patients receiving placebo will have sham dose escalation to maintain blinding.
National Jewish Health, Denver
National Jewish Health
OTHER