Ventavis er blevet sammenlignet med placebo (en uvirksom behandling) i en undersøgelse af 203 voksne patienter med stabil pulmonal hypertension (klasse III eller IV), som enten var primær eller forårsaget af en anden tilstand.
Ventavis has been compared with placebo (a dummy treatment) in one study involving 203 adult patients with stable class III or IV pulmonary hypertension that was either primary or caused by another condition.