• Nika Skoro-Sajer and Irene Lang.
• Medical University of Vienna, Division of Cardiology, Department of Internal Medicine II, Waehringer Guertel 18 - 20, 1090 Vienna, Austria.
• Expert Opin Pharmacother. 2008 Jun 1; 9 (8): 1415-20.

BackgroundPulmonary hypertension (PH) is a severely disabling disorder characterized by sustained elevations of pulmonary arterial pressure, ultimately leading to right-heart failure and death. Pulmonary arterial hypertension (PAH) usually occurs in the absence of an evident cause (idiopathic PAH) or may be associated with connective tissue disease, HIV infection, congenital heart disease, chronic liver disease or result from the use of toxic agents and anorexigens.Objective/MethodIntravenous epoprostenol has been widely used in patients with PAH, leading to long-term clinical benefits and improved survival. Epoprostenol has to be delivered through a permanently implanted Intravenous catheter. This may expose patients to potentially life-threatening complications. Thus, more stable compounds and alternative modes of prostacyclin delivery have been sought.ConclusionTreprostinil sodium is a stable prostacyclin analogue, sharing pharmacologic actions similar to epoprostenol with comparable haemodynamic effects. Treprostinil is chemically stable at room temperature and has a long half-life (2 - 4 h), making this drug suitable for subcutaneous administration, with practical benefits in avoiding the risk of line infection and thrombosis, and cardiovascular reactions due to abrupt drug discontinuation.

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