AZ announces US fast track designation for IL-5 inhibitor Fasenra

AstraZeneca (AZ), a leading pharmaceutical company, has recently announced that their IL-5 inhibitor drug, Fasenra, has received Fast Track designation from the US Food and Drug Administration (FDA). This designation recognizes the potential of Fasenra in addressing an unmet medical need for severe eosinophilic asthma patients. In this blog, we will focus on the key points surrounding AZ’s Fast Track designation for Fasenra, its implications for the treatment of severe eosinophilic asthma, and the advantages it offers in the drug approval process.

Key Points

Here are the key points regarding AZ’s Fast Track designation for Fasenra:

1. Fasenra and IL-5 Inhibition:

Fasenra is an IL-5 inhibitor, a class of drugs that target interleukin-5, a cytokine involved in activating eosinophils, a type of white blood cell. By inhibiting IL-5, Fasenra reduces the number of eosinophils, which are responsible for inflammation in the airways of patients with severe eosinophilic asthma.

2. Fast Track Designation:

The FDA’s Fast Track designation is granted to drugs that demonstrate the potential to address significant unmet medical needs. It accelerates the development and review process, allowing for expedited access to treatments for patients with serious conditions. The designation for Fasenra highlights the urgent need for effective therapies for severe eosinophilic asthma.

3. Benefits of Fast Track Designation:

The Fast Track designation offers multiple advantages for Fasenra’s development and approval process. It enables more frequent communication and collaboration with the FDA, a rolling review of the application, and the potential for priority review and accelerated approval. Fast Track also allows for greater access to the drug during the development phase through expanded access programs.

4. Unmet Medical Need in Severe Eosinophilic Asthma:

Severe eosinophilic asthma is a form of asthma characterized by high levels of eosinophils and persistent inflammation in the airways. It affects a small subset of asthma patients who often experience more frequent and severe asthma attacks, leading to a significant impact on their quality of life. Fasenra’s Fast Track designation signifies its potential in addressing this unmet medical need.

5. Potential Impact:

The Fast Track designation for Fasenra reflects its potential to provide an innovative and effective treatment option for severe eosinophilic asthma patients. If approved, Fasenra could offer significant improvements in symptom control, reduce exacerbations, and enhance overall asthma management. This designation expedites its progress through clinical trials, regulatory review, and potentially earlier access for patients.

6. Continued Development of Fasenra:

With the Fast Track designation, AZ can now move forward with a more streamlined and efficient development process for Fasenra. This achievement represents a major milestone in their commitment to advancing respiratory research and providing better treatment options for patients with severe eosinophilic asthma.


The Fast Track designation granted to Fasenra by the FDA marks an important step forward in the development of a new treatment for severe eosinophilic asthma. This IL-5 inhibitor has shown promise in targeting the underlying inflammation and eosinophil activation associated with this condition, addressing a significant unmet medical need. The Fast Track designation expedites Fasenra’s development, potentially accelerating access to this innovative therapy for patients who urgently require effective treatment options. AstraZeneca’s commitment to improving respiratory health is further exemplified through this achievement, and the continued development of Fasenra brings hope for better outcomes in the management of severe eosinophilic asthma.