I et prospektivt multicenter, randomiseret, dobbelblindt, placebokontrolleret studie (BREATHE- 5) fik patienter med pulmonal areteriel hypertension WHO klasse III og Eisenmenger fysiologi associeret med kongenit hjertesygdom Tracleer 62, 5 mg to gange daglig i 4 uger, herefter 125 mg to gang daglig i yderligere 12 uger (n = 37) eller placebo (n = 17).
In a prospective, multi-centre, randomized, double-blind, placebo-controlled study (BREATHE-5), patients with pulmonary arterial hypertension WHO functional Class III and Eisenmenger physiology associated with congenital heart disease received Tracleer 62.5 mg bid for 4 weeks, then 125 mg b.i.d. for a further 12 weeks (n = 37), or placebo (n = 17).