Incyte Gets CRL for Jakafi Extended-Release Tablets


Incyte Corporation, a global biopharmaceutical company, recently received a Complete Response Letter (CRL) from the U.S. Food and Drug Administration (FDA) for its Jakafi extended-release (XR) tablets. Jakafi is an approved medication for the treatment of certain blood disorders, including myelofibrosis and polycythemia vera. In this blog post, we will focus on the key points surrounding Incyte’s receipt of the CRL for Jakafi XR tablets, highlighting the implications for patients and the future of the treatment of these disorders.

Key Points:

1. Incyte’s Jakafi XR Tablets:

Jakafi (ruxolitinib) is a well-established therapy for myelofibrosis and polycythemia vera, two rare blood disorders that affect the bone marrow and blood cells. It is an orally administered medication that works by inhibiting certain enzymes involved in the signaling pathways associated with these disorders. Incyte developed an extended-release version of Jakafi to potentially improve dosing convenience for patients and provide more consistent blood levels to optimize therapeutic response.

2. Complete Response Letter (CRL):

A CRL is issued by the FDA when the review cycle for a New Drug Application is complete, but the agency cannot approve the application in its current form. In the case of Incyte‘s Jakafi XR tablets, the CRL means that further information or data is needed before the FDA can make a decision on the approval. It does not necessarily mean that the FDA has identified any major safety concerns.

3. Implications for Patients:

The receipt of a CRL delays the availability of Jakafi XR tablets to patients who could potentially benefit from this extended-release formulation. Patients with myelofibrosis and polycythemia vera may have been eagerly anticipating this new option as an alternative to the immediate-release formulation. However, it is important to note that the currently approved Jakafi formulation is still available and remains an effective treatment for these blood disorders.

4. Commitment to Address FDA’s Concerns:

Incyte has stated its commitment to working closely with the FDA to address the concerns outlined in the CRL for Jakafi XR tablets. The company will likely engage in further discussions and provide additional data requested by the FDA to support the application’s approval. This collaborative effort demonstrates Incyte’s dedication to advancing the treatment options for patients with myelofibrosis and polycythemia vera.

5. Enhancing Treatment Options:

The development of an extended-release formulation of Jakafi underscores the ongoing efforts to improve treatment options and patient experience for individuals with myelofibrosis and polycythemia vera. If ultimately approved, Jakafi XR tablets could offer dosing convenience and potentially enhanced efficacy by providing more consistent blood levels of the medication. This could lead to improved symptom management and better long-term outcomes for patients.

6. Future Outlook:

Although the receipt of the CRL is a setback for Incyte‘s Jakafi XR tablets, it is important to remember that this is a part of the regulatory process. Incyte has a strong track record in developing innovative treatments for rare blood disorders, and the company’s commitment to addressing the FDA’s concerns is encouraging. As further discussions and data submissions take place, the potential for Jakafi XR tablets to become an additional treatment option remains hopeful.


Incyte’s receipt of a Complete Response Letter for Jakafi extended-release tablets represents a temporary delay in the availability of this potential treatment option for patients with myelofibrosis and polycythemia vera. Despite this setback, the currently approved version of Jakafi continues to provide effective management of these blood disorders. Incyte‘s commitment to addressing the FDA’s concerns demonstrates their dedication to improving treatment options for patients. As discussions and data submissions unfold, the future holds promise for the potential approval of Jakafi XR tablets, which may offer dosing convenience and potentially enhanced efficacy for patients, further advancing the field of rare blood disorder treatments.