Ask to take part

Contact the study team using the details below to take part. If there are no contact details below please ask your doctor in the first instance.

Contact Information:

Trial questions or participation questions: 1-877-CTLILLY (1-877-285-4559) or 1-317-615-4559
LillyTrials@Lilly.com


Physicians interested in becoming principal investigators please contact clinical_inquiry_hub@lilly.com


Study Location:

Skip to Main Content
English | Cymraeg
Be Part of Research - Trial Details - A Study of Pirtobrutinib (LOXO-305) Versus Ibrutinib in Participants With Chronic Lymphocytic Leukemia (CLL)/Small Lymphocytic Lymphoma (SLL)

A Study of Pirtobrutinib (LOXO-305) Versus Ibrutinib in Participants With Chronic Lymphocytic Leukemia (CLL)/Small Lymphocytic Lymphoma (SLL)

Recruiting

Open to: ALL

Age: 18.0 - N/A

Medical Conditions

Chronic Lymphocytic Leukemia
Leukemia, Lymphocytic
Leukemia, B-cell
Small Lymphocytic Lymphoma


This information is provided directly by researchers, and we recognise that it isn't always easy to understand. We are working with researchers to improve the accessibility of this information. In some summaries, you may come across links to external websites. These websites will have more information to help you better understand the study.


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 Part 1. Participation could last up to 2 years for Part 2.

Start dates may differ between countries and research sites. The research team are responsible for keeping the information up-to-date.  

The recruitment start and end dates are as follows:

Jul 2022 Jun 2025

Publications

"Woyach JA, Qiu L, Grosicki S, Wrobel T, Capra M, Czyz J, Yi S, Eom KS, Panovska A, Jurczak W, Laribi K, Jacobasch L, Baker R, Agajanian R, Berkovits A, Ozcan M, Lepretre S, Coombs CC, Cramer P, Lewis KL, Hill M, Bao K, Bian Y, De Batista Ribeiro SR, Bhandari NR, Ruppert AS, Leow CC, Wierda WG. Pirtobrutinib Versus Ibrutinib in Treatment-Naive and Relapsed/Refractory Chronic Lymphocytic Leukemia/Small Lymphocytic Lymphoma. J Clin Oncol. 2026 Feb 20;44(6):476-485. doi: 10.1200/JCO-25-02477. Epub 2025 Dec 7."; "41353787"

INTERVENTIONAL

Intervention Type : DRUG
Intervention Description : Administered orally.

Intervention Arm Group : Pirtobrutinib Part 1;Pirtobrutinib Part 2;

Intervention Type : DRUG
Intervention Description : Administered orally.

Intervention Arm Group : Ibrutinib;



You can take part if:



You may not be able to take part if:


This is in the inclusion criteria above


Below are the locations for where you can take part in the trial. Please note that not all sites may be open.

  • Castle Hill Hospital
    Cottingham
    HU16 5JQ
  • HOPE Centre
    Leicester
    LE1 5WW
  • Bristol Haematology and Oncology Centre
    Bristol
    BS2 8ED
  • St Bartholomew's Hospital
    London
    EC1A 7BE
  • Singleton Hospital
    Swansea
    SA2 8QA

Physicians interested in becoming principal investigators please contact clinical_inquiry_hub@lilly.com


Trial questions or participation questions: 1-877-CTLILLY (1-877-285-4559) or 1-317-615-4559
LillyTrials@Lilly.com



The study is sponsored by Loxo Oncology, Inc.




We'd like your feedback

Your feedback is important to us. It will help us improve the quality of the study information on this site. Please answer both questions.


Is this study information helpful?

What will you do next?

Read full details for Trial ID: NCT05254743
Last updated 13 February 2026

This page is to help you find out about a research study and if you may be able to take part

You can print or share the study information with your GP/healthcare provider or contact the research team directly.