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Clazosentan summary slide final.pdf (577.96 kB)

Clazosentan: First Approval

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posted on 2022-03-30, 00:41 authored by Arnold Lee


Funding The preparation of this review was not supported by any external funding.

Authorship and Conflict of interest During the peer review process the manufacturer of the agent under review was offered an opportunity to comment on the article. Changes resulting from any comments received were made by the authors on the basis of scientific completeness and accuracy. Arnold Lee is a salaried employee of Adis International Ltd/Springer Nature, and declares no relevant conflicts of interest. All authors contributed to the review and are responsible for the article content.

Ethics approval, Consent to participate, Consent to publish, Availability of data and material, Code availability Not applicable.

Additional information about this Adis Drug Review can be found here


Clazosentan (PIVLAZ) is a small molecule, endothelin (ET) A receptor-selective antagonist being developed by Idorsia Pharmaceuticals. ETA receptor inhibition by clazosentan decreases ET-related cerebral vasospasm, which may occur after an aneurysmal subarachnoid haemorrhage. Clazosentan has been approved in Japan for use in the prevention of cerebral vasospasm, vasospasm-related cerebral infarction and cerebral ischaemic symptoms after aneurysmal subarachnoid haemorrhage, following the results from the JapicCTI163369 and JapicCTI163368 phase III trials. This article summarizes the milestones in the development of clazosentan leading to this first approval in this indication.


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