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What is Umbralisib and explain in detail?
Umbralisib, sold under the brand name Ukoniq, is a medication for the treatment of marginal zone lymphoma (MZL) and follicular lymphoma (FL). It is taken by mouth.Umbralisib is a kinase inhibitor including PI3K-delta and casein kinase CK1-epsilon.The most common side effects include increased creatinine, diarrhea-colitis, fatigue, nausea, neutropenia, transaminase elevation, musculoskeletal pain, anemia, thrombocytopenia, upper respiratory tract infection, vomiting, abdominal pain, decreased appetite, and rash.Umbralisib was granted accelerated approval for medical use in the United States in February 2021. However, due to concerns for increased long term side effects leading to inferior overall survival which led to increased FDA scrutiny in the form of an ODAC review, it has been withdrawn from the US market.

Medical uses
On April 15, 2022, TG Therapeutics announced the voluntary withdrawal of Ukoniq (umbralisib) from sale for its approved use in the treatment of marginal zone lymphoma and follicular lymphoma. Furthermore, the company withdrew the pending Biologics License Application (BLA) and supplemental New Drug Application (sNDA) for the treatment of chronic lymphocytic leukemia (CLL) and small lymphocytic leukemia (SLL) which utilized umbralisib in tandem with ublituximab, known as the "U2" regimen. The decision was based on the most recent overall survival (OS) data from the Phase 3 trial, Unity-CLL, that illustrated and increasing imbalance in OS.
Umbralisib was indicated for adults with relapsed or refractory marginal zone lymphoma (MZL) who have received at least one prior anti-CD20-based regimen; and adults with relapsed or refractory follicular lymphoma (FL) who have received at least three prior lines of systemic therapy.

Adverse effects
The prescribing information provides warnings and precautions for adverse reactions including infections, neutropenia, diarrhea and non-infectious colitis, hepatotoxicity, and severe cutaneous reactions.

History
It has undergone clinical studies for chronic lymphocytic leukemia (CLL). Three year data (including follicular lymphoma and DLBCL) was announced June 2016. It is in combination trials for various leukemias and lymphomas, such as mantle cell lymphoma (MCL) and other lymphomas.Umbralisib was granted breakthrough therapy designation by the U.S