Donidalorsen: First Approval

<p dir="ltr"><b>Funding</b> The preparation of this review was not supported by any external funding.</p><p dir="ltr"><b>Declarations</b></p><p dir="ltr"><b>Authorship and Conflict of interest</b> Yahiya Y. Syed 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.</p><p><br></p><p dir="ltr"><b>Ethics approval, Consent to participate, Consent to publish, Availability of data and material, Code availability</b> not applicable</p><p><br></p><p dir="ltr">Additional information about this Adis Drug Review can be found <a href="https://www.springer.com/gp/adis/products-services/adis-journals-newsletters/adis-drug-reviews" target="_blank">here</a></p><p><br></p><p dir="ltr"><b>Abstract</b></p><p dir="ltr">Donidalorsen (DAWNZERA™) is a first-in-class, RNA-targeted antisense oligonucleotide (ASO), developed by Ionis Pharmaceuticals for the prevention of hereditary angioedema (HAE) attacks. It received its first approval on 21 August 2025 in the USA for the prophylaxis of HAE attacks in adult and paediatric patients aged 12 years and older. Donidalorsen is currently under regulatory review in the EU and in phase III development in several other countries. This article summarizes the key milestones in the development of donidalorsen leading to its first approval for HAE.</p><p><br></p><p dir="ltr">© Springer Nature Switzerland AG 2025</p>