Pirtobrutinib
Last Updated: 02/24/2026
A Phase 1/2, Dose-finding Study Investigating the Safety and Efficacy of Pirtobrutinib in Adults With Immune Thrombocytopenia
Summary: The purpose of the phase 1 part of this study is to evaluate how well pirtobrutinib is tolerated and what side effects may occur. The phase 2 part of the study will further investigate efficacy and safety of multiple pirtobrutinib dosages versus placebo. The study drug will be administered orally in participants with Primary Immune Thrombocytopenia (ITP). Blood tests will be performed to check how...
A Phase 2, Open-Label, Randomized Study Evaluating the Efficacy and Safety of 3 Doses of Pirtobrutinib in Participants With Relapsed or Refractory Chronic Lymphocytic Leukemia/Small Lymphocytic Lymphoma Who Previously Received Treatment With a Covalent Bruton Tyrosine Kinase Inhibitor
Summary: The main purpose of Part 1 of this study is to assess the efficacy and safety of 3 dose levels of Pirtobrutinib in participants with chronic lymphocytic leukemia (CLL) or small lymphocytic lymphoma (SLL), who have received 1-3 lines of treatment including a covalent Bruton tyrosine kinase (BTK) inhibitor. The purpose of Part 2 of this study is to evaluate pirtobrutinib monotherapy in participants ...
A Phase 3 Open-Label, Randomized Study of Pirtobrutinib (LOXO-305) Versus Ibrutinib in Patients With Chronic Lymphocytic Leukemia/Small Lymphocytic Lymphoma (BRUIN-CLL-314)
Summary: The purpose of Part 1 of this study is to compare the efficacy and safety of pirtobruitinib (LOXO-305) to ibrutinib in participants with CLL/SLL; participants may or may not have already had treatment for their cancer. The purpose of Part 2 of this study evaluates pirtobrutinib monotherapy in treatment-naïve participants with CLL/SLL with 17p deletions. Participation could last up to six years for...
In Treatment-Naive Patients With Primary Central Nervous System Lymphoma (PCNSL): A Multicenter Two-Cohort Study of Methotrexate Combined With Rituximab, Sintilimab and Pirtobrutinib (Prospective Interventional Cohort) vs. Real-World Investigator-Selected Treatment (Observational Cohort)
Summary: The goal of this clinical trial is to evaluate a new combination therapy for patients with newly diagnosed Primary Central Nervous System Lymphoma (PCNSL). The main questions it aims to answer are: (1) Does the combination of Methotrexate, Rituximab, Sintilimab, and Pirtobrutinib improve the Complete Remission Rate (CRR)? (2) Is this regimen safe and tolerable for patients? Researchers will compar...
A Phase 2, Open-Label, Randomized Study of Pirtobrutinib and Brexucabtagene Autoleucel in Patients With Relapsed or Refractory Mantle Cell Lymphoma
Summary: This is a phase 2, open-label, randomized, multicenter clinical trial in patients with relapsed/refractory mantle cell lymphoma (R/R MCL) who meet the criteria for standard-of-care FDA label for CD19 CAR T-cell therapy with brexucabtagene autoleucel (brexu-cel).
A Phase 3, Open-Label, Randomized Study to Evaluate the Safety and Efficacy of BGB-16673 Compared to Pirtobrutinib in Patients With Relapsed/Refractory Chronic Lymphocytic Leukemia or Small Lymphocytic Lymphoma
Summary: The purpose of this study is to evaluate the efficacy and safety of BGB-16673 alone compared with pirtobrutinib in patients with relapsed or refractory (R/R) chronic lymphocytic leukemia (CLL) or small lymphocytic lymphoma (SLL) who had been previously treated with a covalent Bruton tyrosine kinase inhibitor (cBTKi).
A Phase 1b/2, Open-Label, Safety and Efficacy Study of Epcoritamab (GEN3013; DuoBody®-CD3xCD20) in Relapsed/Refractory Chronic Lymphocytic Leukemia and Richter's Syndrome
Summary: The study is a global, multi-center safety and efficacy trial of epcoritamab, an antibody also known as EPKINLY™ and GEN3013 (DuoBody®-CD3xCD20). Epcoritamab will be tested either in Relapsed/refractory (R/R) chronic lymphocytic leukemia (CLL) as: * Monotherapy, or * Combination therapy: * epcoritamab + venetoclax * epcoritamab + pirtobrutinib In Non-United States (US) Participants Only: Treatment...
Long-Term Safety of Pirtobrutinib in Participants From Study J2N-MC-JZNJ With Previously Treated Chronic Lymphocytic Leukemia/Small Lymphocytic Lymphoma or Non-Hodgkin Lymphoma
Summary: The purpose of this study is to find out more about the long-term safety of pirtobrutinib in participants with previously treated types of blood cancer. Participants must have chronic lymphocytic leukemia, small lymphocytic lymphoma, or non-Hodgkins lymphoma. The study is open to those who completed the original study - J2N-MC-JZNJ (NCT04849416) and continue to benefit from treatment. Treatment wi...
Long-Term Safety of Pirtobrutinib in Participants From Study LOXO-BTK-18001 With Previously Treated Chronic Lymphocytic Leukemia/Small Lymphocytic Lymphoma or Non-Hodgkin Lymphoma
Summary: Study J2N-MC-JZ01 (JZ01) is an individual-study appendix (ISA) under master protocol J2N-MC-JZNY, and represents participants from the completed originator study, clinical study LOXO-BTK-18001/J2N-OX-JZNA. Participants in the originator study will have the opportunity to continue their assigned study intervention or continue their follow-up visits by transitioning to this study. This study will ev...
A Phase 2 Study of Fixed Duration Therapy With Pirtobrutinib and Obinutuzumab in Previously Untreated Chronic Lymphocytic Leukemia (POP)
Summary: This study will evaluate fixed-duration therapy with pirtobrutinib and obinutuzumab given over 12 cycles (approximately 1 year) as first-line treatment of chronic lymphocytic leukemia or small lymphocytic lymphoma (CLL or SLL).
A Master Protocol to Evaluate the Long-Term Safety of Pirtobrutinib
Summary: The master protocol study J2N-MC-JZNY provides a framework to enable the evaluation of the long-term safety and efficacy of pirtobrutinib after completion of clinical studies evaluating pirtobrutinib. The clinical studies that will feed into this master protocol are referred to as originator studies. The master protocol will govern individual study-specific appendices (ISAs) that will represent pa...
Time-limited Triplet Combination of Pirtobrutinib, Venetoclax, and Obinutuzumab for Patients With Treatment-naïve Chronic Lymphocytic Leukemia (CLL) or Richter Transformation (RT)
Summary: To learn if the combination of pirtobrutinib (also called LOXO-305), venetoclax, and obinutuzumab is safe and effective when given to patients with chronic lymphocytic leukemia (CLL) or Richter transformation (RT) who have not previously received treatment.
Last Updated: 02/24/2026