What is the clinical use of iloprost (Ventavis)?

Iloprost, sold under the brand name Ventavis, is primarily used in the treatment of pulmonary arterial hypertension (PAH). This condition involves high blood pressure in the pulmonary arteries, which can lead to heart failure if not managed properly. Iloprost acts as a prostacyclin analog, leading to vasodilation of pulmonary and systemic arterial vascular beds. This helps to reduce pulmonary artery pressure and improve exercise capacity and overall quality of life for patients suffering from PAH.

The conditions presented in the other options do not align with the primary indication of iloprost. Chronic obstructive pulmonary disease and asthma attacks typically require different classes of medication, such as bronchodilators or corticosteroids, whereas acute respiratory distress syndrome often necessitates supportive care, including mechanical ventilation and addressing the underlying cause, rather than the specific mechanism of action of iloprost. Thus, the correct answer highlights iloprost's targeted application in managing pulmonary arterial hypertension.