• Curr Med Res Opin · Jan 2015

    Review

    Ambrisentan for the treatment of adults with pulmonary arterial hypertension: a review.

    • Andrew J Peacock, William Zamboni, and Carmine Dario Vizza.
    • a a Scottish Pulmonary Vascular Unit, Regional Heart and Lung Centre , Glasgow , UK.
    • Curr Med Res Opin. 2015 Jan 1; 31 (9): 1793-807.

    ObjectiveTo provide an overview of the drug profile of the orally active, selective endothelin A receptor antagonist ambrisentan, and its efficacy and safety in the treatment of patients with pulmonary arterial hypertension (PAH).Research Design And MethodsMedical literature on the use of ambrisentan in PAH was identified using MEDLINE and EMBASE. Additional references were identified from the reference lists of published articles and from the authors' own bibliographies.ResultsSignificant improvements in exercise capacity were observed with approved dosages of ambrisentan (5 or 10 mg once daily) in the AMB-220 dose-ranging study and the pivotal ARIES-1 and ARIES-2 trials, with sustained effects up to 2 years observed in ARIES-E. Improvements in cardiopulmonary hemodynamic variables were reported in AMB-220 and ARIES-E (subset analysis). Ambrisentan had little or no effect on hepatic transporters in in vitro studies and displayed a low risk of potential drug-drug interactions, including those with other PAH therapies. Results from the VOLT post-marketing program confirmed the safety profile of ambrisentan observed in the ARIES studies, including the low incidence of liver function test abnormalities. Peripheral edema and anemia were common side effects of endothelin receptor antagonist therapies, including ambrisentan. In the recently completed AMBITION study (ClinicalTrials.gov Identifier: NCT01178073), upfront initial combination therapy with ambrisentan and tadalafil significantly reduced the risk of clinical failure (primary endpoint) by 50% compared with the pooled monotherapy groups.ConclusionsThe long-term efficacy and safety profile of ambrisentan in patients with PAH is supported by data from a comprehensive clinical trial program and real-life, post-marketing observations.

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