PT - JOURNAL ARTICLE AU - N. Galiè AU - L. Negro AU - G. Simonneau TI - The use of combination therapy in pulmonary arterial hypertension: new developments AID - 10.1183/09059180.00003809 DP - 2009 Sep 01 TA - European Respiratory Review PG - 148--153 VI - 18 IP - 113 4099 - http://err.ersjournals.com/content/18/113/148.short 4100 - http://err.ersjournals.com/content/18/113/148.full SO - EUROPEAN RESPIRATORY REVIEW2009 Sep 01; 18 AB - There is a strong clinical rationale for combination therapy in pulmonary arterial hypertension (PAH), as several pathological pathways have been implicated in its pathogenesis and no single agent has yet been shown to deliver completely satisfactory results. Registry data indicate that use of combination therapy is in fact common in existing clinical practice, even though support has been largely empirical or derived from small-scale observational studies. Data from large, adequately powered, randomised controlled trials of combination therapy in PAH are now emerging and suggest that combination therapy may be clinically beneficial. Studies of bosentan in combination with prostanoids and phosphodiesterase (PDE)-5 inhibitors show consistent evidence of improvements in exercise capacity compared with placebo. Similar improvements have been observed with PDE-5 inhibitors in combination with prostanoids. The appropriate timing of combination therapy requires further evaluation but goal-oriented therapy using combinations of oral and inhaled drugs has been shown to provide acceptable long-term results in patients with advanced PAH. Monitoring should be performed regularly and be based on repeatable, noninvasive, measurable parameters that have prognostic value.