title: Tadalafil for the treatment of pulmonary arterial hypertension.
abstract: BACKGROUND
  Tadalafil, a long-acting phosphodiesterase-5 inhibitor (PDE-5) is the most recent oral agent to receive FDA approval for the treatment of pulmonary arterial hypertension (PAH).
  
  
  OBJECTIVE
  With several new agents emerging for the treatment of PAH, this article reviews tadalafil, the compound and its properties, clinical evidence supporting its use, and the role of tadalafil in the current treatment approach for patients with PAH.
  
  
  METHODS
  A broad PubMed literature search was performed to identify the most current data on the use of tadalafil for PAH.
  
  
  RESULTS
  Tadalafil received FDA approval in 2009 following the recently published pivotal trial that demonstrated that the use of tadalafil 40 mg once daily was well tolerated, improved exercise capacity and quality of life measures and reduced time to clinical worsening in PAH patients. As the second PDE-5 inhibitor to gain approval for PAH, clinical properties such as its long half-life leading to once-daily dosing and possibly improved compliance, as well as potential cost benefit, may distinguish tadalafil from sildenafil in the widespread treatment of PAH.
authors.affiliation: Columbia University - Pediatric Cardiology, 3959 Broadway BH-2, North New York, New York 10032, USA. esb14@columbia.edu
authors.forename: Erika B
authors.initials: EB
authors.lastname: Rosenzweig
mesh_terms: D002243:Carbolines / Q000627:therapeutic use*; D007172:Erectile Dysfunction / Q000188:drug therapy; D006207:Half-Life; D006801:Humans; D006976:Hypertension, Pulmonary / Q000188:drug therapy; D008297:Male; D058986:Phosphodiesterase 5 Inhibitors; D010726:Phosphodiesterase Inhibitors / Q000627:therapeutic use*; D010727:Phosphoric Diester Hydrolases; D010879:Piperazines / Q000627:therapeutic use; D011651:Pulmonary Artery / Q000187:drug effects*; D011687:Purines / Q000627:therapeutic use; D000068677:Sildenafil Citrate; D013450:Sulfones / Q000627:therapeutic use; D000068581:Tadalafil; D014665:Vasodilator Agents / Q000627:therapeutic use
chemical_list: D002243:Carbolines; D058986:Phosphodiesterase 5 Inhibitors; D010726:Phosphodiesterase Inhibitors; D010879:Piperazines; D011687:Purines; D013450:Sulfones; D014665:Vasodilator Agents; D000068581:Tadalafil; D000068677:Sildenafil Citrate; D010727:Phosphoric Diester Hydrolases