Clinical Drug Investigation

, Volume 38, Issue 3, pp 219–229 | Cite as

Surveillance on The Safety and Efficacy of Ambrisentan (Volibris Tablet 2.5 mg) in Patients with Pulmonary Arterial Hypertension in Real Clinical Practice: Post-marketing Surveillance (Interim Analysis Report)

  • Tomohiko TakahashiEmail author
  • Satoru Hayata
  • Akihiro Kobayashi
  • Yuna Onaka
  • Takeshi Ebihara
  • Terufumi Hara
Original Research Article


Background and Objective

Pulmonary arterial hypertension (PAH) is an intractable and rare disease and the accumulation of clinical evidence under real-world setting is needed. A post-marketing surveillance for the endothelin receptor antagonist ambrisentan (Volibris tablet) has been conducted by all-case investigation since September 2010. This paper is an interim report on the safety and efficacy of ambrisentan in 702 patients with PAH.


PAH patients aged 15 years or older were subjected to the analysis. The safety analysis by overall cases or stratification of patient backgrounds and the efficacy analysis were investigated.


Regarding patient characteristics, the 702 patients subjected to safety analysis included 543 (77.4%) women and 546 (77.8%) patients at WHO functional class II/III. The mean observational time was 392.7 days. A total of 324 adverse drug reaction (ADR) occurred in 204 (29.1%) patients. Common ADRs (≥ 2%) included anemia (4.6%), peripheral edema (4.1%), headache (3.6%), edema and face edema (2.6% each), abnormal hepatic function (2.3%), and epistaxis (2.1%). There were 82 serious ADRs occurring in 44 (6.3%) patients (385 serious adverse events in 184 (26.2%) patients). Although 11 (1.6%) interstitial lung disease (ILD) cases were reported, all were observed in patients with disease that may contribute to ILD and therefore it is difficult to assess if ambrisentan was associated with these events. There was no difference in safety in relation to the presence/absence of connective tissue disease-related PAH (CTD-PAH) or combination therapy. Among 677 patients subjected to efficacy analysis, those in whom hemodynamic status was determined before and after treatment showed improvement in the mean pulmonary arterial pressure and pulmonary vascular resistance after treatment.


The interim results showed safety consistent with the known profile of ambrisentan in terms of the types and frequencies of ADRs in patients with PAH in real clinical practice, in comparison with previous clinical trials in Japan and the rest of the world. Thus, these results provided another corroboration of the tolerability of ambrisentan and we continue to monitor proper use information via the post-marketing surveillance to ensure any new safety signals are identified in a timely manner ( NCT01406327).


Compliance with Ethical Standards


Funding GlaxoSmithKline K.K. funded this surveillance. Trademarks are owned by or licensed to the GSK group of companies

Conflict of interest

Tomohiko Takahashi and Satoru Hayata, Akihiro Kobayashi, Yuna Onaka, Takeshi Ebihara and Terufumi Hara are employees of GlaxoSmithKline K.K and Akihiro Kobayashi,Yuna Onaka, Takeshi Ebihara, and Terufumi Hara hold shares in the company. This investigation was conducted by GlaxoSmithKline K.K. We ensure that all potential conflicts of interest were disclosed.

Ethical approval

This investigation was conducted in accordance with the Japanese Good Post-Marketing Study Practice (GPSP, Ordinance of Ministry of Health, Labour and Welfare No. 171 of December 20, 2004). Informed consent was not required from all individual participants included in this survey according to this GPSP. The agreement for publication on this survey was obtained from all the participating institutions. The rules of personal data confidentiality were fully respected.

Supplementary material

40261_2017_602_MOESM1_ESM.docx (20 kb)
Supplementary material 1 (DOCX 20 kb)


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Copyright information

© Springer International Publishing AG, part of Springer Nature 2017

Authors and Affiliations

  • Tomohiko Takahashi
    • 1
    Email author
  • Satoru Hayata
    • 1
  • Akihiro Kobayashi
    • 2
  • Yuna Onaka
    • 3
  • Takeshi Ebihara
    • 3
  • Terufumi Hara
    • 3
  1. 1.Rare Disease Medicine Development CenterGlaxoSmithKline K.KTokyoJapan
  2. 2.Biomedical Data Science DepartmentGlaxoSmithKline K.KTokyoJapan
  3. 3.PMS DepartmentGlaxoSmithKline K.KTokyoJapan

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