Clinical Improvement
Ventavis® (iloprost) Inhalation Solution is the first PAH therapy in which clinical improvement was the primary endpoint of study design. In a placebo-controlled, randomized, double-blind, multicenter study, patients in the Ventavis group saw a nearly 5-fold improvement in clinical endpoint versus patients in the placebo.1
Primary endpoint of study
See if patients on Ventavis showed significant clinical improvement after 12 weeks of therapy compared to patients taking placebo.
The primary endpoint was a combined measure of 3 factors1:
- Lack of clinical deterioration or death
- Improved walking distance on the 6-minute walk test by at least 10%
- Improvement in one (1) NYHA functional class
Significant improvement in composite clinical endpoint1

AIR Pivotal Trial Randomized, double-blind, multicenter, placebo-controlled trial to evaluate the efficacy and safety of Ventavis in the treatment of PAH NYHA Class III or IV (n=146).
* Composite clinical endpoint defined as a) at least 10% increase vs. baseline in 6-minute walk distance with b) improvement by at least one NYHA Class vs. baseline without c) death or clinical worsening
† WHO Group I includes idiopathic PAH, familial PAH, PAH associated with related condition (e.g., collagen vascular disease, congenital systemic-to-pulmonary shunts, portal hypertension, HIV infection, drugs and toxins, etc.)
‡ Change from baseline to 12 weeks with measurement 30 minutes after dosing.
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