Drugs / Idelalisib
last change Apr 2026 re-read 8 days ago

Idelalisib

Small molecule targets PIK3CD via inhibition

Developed for
chronic lymphocytic leukemia/small lymphocytic lymphoma · B-cell chronic lymphocytic leukemia · follicular lymphoma · mantle cell lymphoma · acute myeloid leukemia · diffuse large B-cell lymphoma · marginal zone lymphoma · Waldenstrom macroglobulinemia
+19 more · acute lymphoblastic leukemia · chronic myelomonocytic leukemia · lymphoplasmacytic lymphoma · plasma cell myeloma · amyloidosis · B-cell neoplasm · colorectal cancer · Hodgkins lymphoma · idiopathic pulmonary fibrosis · indolent B-cell non-Hodgkin lymphoma · lymphoid neoplasm · mediastinal malignant lymphoma · myelofibrosis · non-Hodgkin lymphoma · non-small cell lung carcinoma · pancreatic ductal adenocarcinoma · prolymphocytic leukemia · Richter transformation · allergic rhinitis
Investigated by
Gilead Sciences · National Cancer Institute (NCI) · Dana-Farber Cancer Institute · OHSU Knight Cancer Institute · Alliance for Clinical Trials in Oncology · Celgene Corporation
+26 more · German CLL Study Group · Oregon Health and Science University · Acetylon Pharmaceuticals Incorporated · Aptevo Therapeutics · Asha Nayak · Biologics, Inc. · Boehringer Ingelheim · Calluna Pharma AS · Eli Lilly and Company · Fondazione Italiana Linfomi - ETS · Fred Hutchinson Cancer Center · French Innovative Leukemia Organisation · GlaxoSmithKline · Hoffmann-La Roche · John Mark Sloan · Mayo Clinic · Merck Sharp & Dohme LLC · MorphoSys AG · Nordic Lymphoma Group · Novartis Pharmaceuticals · Oslo University Hospital · PETHEMA Foundation · Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins · University of Maryland, Baltimore · University of Miami Sylvester Comprehensive Cancer Center · Virginia Commonwealth University

Regulatory milestones approvals, filings & regulatory actions · 6 recorded

MilestoneJurisdictionBrandIndicationDateSentence it was read from
Filed B-cell chronic lymphocytic leukemia 2 milestones
Filed US (FDA) Zydelig B-cell chronic lymphocytic leukemia 2015-05-31

“Based on the Study 119 trial results, Gilead has filed a supplemental New Drug Application (sNDA) with the U.S.” gilead.com ↗

Filed US (FDA) — B-cell chronic lymphocytic leukemia 2013-12-06

“Gilead submitted an NDA for idelalisib for the treatment of CLL on December 6, 2013 .” gilead.com ↗

Filed indolent B-cell non-Hodgkin lymphoma 1 milestone
Filed EU (EMA) — indolent B-cell non-Hodgkin lymphoma 2013-11-20

“Gilead’s Marketing Authorization Application (MAA) for idelalisib for the treatment of iNHL and CLL was validated by the European Medicines Agency (EMA) on November 20.” gilead.com ↗

“In addition, Gilead submitted Marketing Authorisation Applications for both iNHL and CLL in Europe .” gilead.com ↗

Filed indolent primary cutaneous B-cell lymphoma 1 milestone
Filed US (FDA) — indolent primary cutaneous B-cell lymphoma 2013-09-11

“On September 11, 2013, Gilead submitted a New Drug Application to the U.S. Food and Drug Administration for idelalisib for the treatment of refractory iNHL.” gilead.com ↗

Approved Indication not stated 2 milestones
Approved EU (EMA) Zydelig — 2014-09-18 europa.eu ↗
Approved US (FDA) ZYDELIG — 2014-07-23 fda.gov ↗

Trials 53

PhaseRegistry idDatesIndicationSponsorStatusOutcome
Phase 117 trials · 2 missed
Phase 1 NCT03639324 Oct 2020 → Oct 2021 chronic lymphocytic leukemia/small lymphocytic lymphoma Virginia Commonwealth University Withdrawn No outcome recorded Stop: Enrollment
Phase 1 NCT03878524 Apr → Dec 2020 acute myeloid leukemia, atypical chronic myeloid leukemia, BCR-ABL1 negative, blast phase chronic myelogenous leukemia, BCR-ABL1 positive, castration-resistant prostate carcinoma +14 OHSU Knight Cancer Institute Terminated No outcome recorded Stop: Enrollment
Phase 1 NCT03349346 Jun 2019 → Feb 2021 diffuse large B-cell lymphoma, mediastinal malignant lymphoma Gilead Sciences Withdrawn No outcome recorded
Phase 1 NCT03151057 Jul 2018 → Jun 2022 B-cell chronic lymphocytic leukemia, diffuse large B-cell lymphoma, follicular lymphoma, mantle cell lymphoma Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins Terminated No outcome recorded
Phase 1 NCT02787369 May 2016 → Apr 2026 overdue chronic lymphocytic leukemia/small lymphocytic lymphoma Dana-Farber Cancer Institute Active not recruiting No outcome recorded
Phase 1 NCT02779283 Jan 2016 → Apr 2018 acute lymphoblastic leukemia, acute myeloid leukemia OHSU Knight Cancer Institute Completed No outcome recorded
Phase 1 NCT02538614 Dec 2015 → Jul 2017 chronic lymphocytic leukemia/small lymphocytic lymphoma Gilead Sciences Terminated No outcome recorded
Phase 1 NCT02603445 Nov 2015 → Jul 2018 mantle cell lymphoma Novartis Pharmaceuticals Completed No outcome recorded
Phase 1 NCT02468557 Jul 2015 → Apr 2016 pancreatic ductal adenocarcinoma Gilead Sciences Terminated No outcome recorded
Phase 1 NCT02457598 Jun 2015 → Sep 2024 B-cell neoplasm Gilead Sciences Terminated No outcome recorded
Phase 1/24 trials
Phase 1/2 NCT03742323 Jul 2018 → Jun 2020 acute lymphoblastic leukemia PETHEMA Foundation Terminated No outcome recorded Stop: Enrollment
Phase 1/2 NCT03257722 Sep 2017 → Aug 2020 metastatic neoplasm, non-small cell lung carcinoma Asha Nayak Terminated No outcome recorded Stop: Enrollment
Phase 1/2 NCT01306643 Feb 2011 → Aug 2015 chronic lymphocytic leukemia/small lymphocytic lymphoma, follicular lymphoma, marginal zone lymphoma Gilead Sciences Completed No outcome recorded
Phase 1/2 NCT01090414 Mar 2010 → Jun 2018 chronic lymphocytic leukemia/small lymphocytic lymphoma Gilead Sciences Terminated No outcome recorded
Phase 222 trials · 2 met primary
Phase 2 NCT06736990 Jun 2025 → Nov 2026 expected idiopathic pulmonary fibrosis Calluna Pharma AS Active not recruiting No outcome recorded
Phase 2 NCT05725200 Sep 2022 → Dec 2038 expected colorectal cancer Oslo University Hospital Recruiting No outcome recorded
Phase 2 NCT03890289 Oct 2019 → Apr 2021 follicular lymphoma Fondazione Italiana Linfomi - ETS Terminated No outcome recorded
Phase 2 NCT03133221 Oct 2017 → Jun 2023 Waldenstrom macroglobulinemia, chronic lymphocytic leukemia/small lymphocytic lymphoma, follicular lymphoma, marginal zone lymphoma University of Maryland, Baltimore Completed No outcome recorded
Phase 2 NCT03576443 Jul 2017 → Sep 2021 diffuse large B-cell lymphoma Nordic Lymphoma Group Completed No outcome recorded
Phase 2 NCT02962401 Mar 2017 → Aug 2020 Waldenstrom macroglobulinemia French Innovative Leukemia Organisation Completed Met primary
Phase 2 NCT02968563 Dec 2016 → Jun 2019 B-cell chronic lymphocytic leukemia Gilead Sciences Completed No outcome recorded
Phase 2 NCT02639910 Nov 2016 → Nov 2018 chronic lymphocytic leukemia/small lymphocytic lymphoma MorphoSys AG Completed No outcome recorded
Phase 2 NCT02662296 Mar 2016 → Feb 2022 chronic lymphocytic leukemia/small lymphocytic lymphoma, prolymphocytic leukemia Fred Hutchinson Cancer Center Withdrawn No outcome recorded Stop: Enrollment
Phase 2 NCT02590588 Jan 2016 → Mar 2017 amyloidosis John Mark Sloan Terminated No outcome recorded Stop: Enrollment
Phase 38 trials · 2 met primary
Phase 3 NCT02536300 Jan 2016 → Sep 2022 follicular lymphoma Gilead Sciences Terminated No outcome recorded Stop: Enrollment
Phase 3 NCT01980875 Apr 2015 → May 2016 B-cell chronic lymphocytic leukemia Gilead Sciences Terminated No outcome recorded
Phase 3 NCT01980888 Feb 2014 → May 2016 chronic lymphocytic leukemia/small lymphocytic lymphoma Gilead Sciences Terminated No outcome recorded
Phase 3 NCT01732913 Jan 2013 → May 2016 indolent B-cell non-Hodgkin lymphoma Gilead Sciences Terminated No outcome recorded
Phase 3 NCT01732926 Jan 2013 → May 2016 non-Hodgkin lymphoma Gilead Sciences Terminated No outcome recorded
Phase 3 NCT01659021 Dec 2012 → Aug 2018 chronic lymphocytic leukemia/small lymphocytic lymphoma Gilead Sciences Terminated Met primary
Phase 3 NCT01539291 Oct 2012 → May 2018 chronic lymphocytic leukemia/small lymphocytic lymphoma Gilead Sciences Terminated No outcome recorded
Phase 3 NCT01569295 Jun 2012 → Jun 2019 chronic lymphocytic leukemia/small lymphocytic lymphoma Gilead Sciences Completed Met primary
Phase 42 trials
Phase 4 NCT07218341 Mar 2026 → May 2030 expected chronic lymphocytic leukemia/small lymphocytic lymphoma Eli Lilly and Company Recruiting No outcome recorded
Phase 4 NCT02739360 May 2016 → Dec 2017 lymphoid neoplasm Gilead Sciences Terminated No outcome recorded
Comparator or background therapy9 trials
Phase 1 NCT00836914 Comparator Feb → Mar 2009 allergic rhinitis Gilead Sciences Completed No outcome recorded
Phase 2 NCT04699461 Comparator Nov 2021 → Nov 2022 follicular lymphoma ADC Therapeutics S.A. Terminated No outcome recorded
Phase 3 NCT07139873 Comparator Sep 2025 → Jan 2029 expected chronic lymphocytic leukemia/small lymphocytic lymphoma Dizal Pharmaceuticals Recruiting No outcome recorded
Phase 3 NCT06846671 Comparator Apr 2025 → May 2028 expected B-cell chronic lymphocytic leukemia BeOne Medicines Recruiting No outcome recorded
Phase 3 NCT06205290 Comparator Jan 2024 → Oct 2031 B-cell chronic lymphocytic leukemia Juno Therapeutics, Inc., a Bristol-Myers Squibb Company Withdrawn No outcome recorded Stop: Business

News releases announcing trial results or a regulatory action · 16

DateIssuerRelease
2022-06-04 AstraZeneca Results Calquence plus obinutuzumab demonstrated sustained survival benefit in 1st-line chronic lymphocytic leukaemia with 90% of patients surviving five years in ELEVATE-TN trial astrazeneca.com ↗
At 42 months, an estimated 62% of patients treated with Calquence were alive and had not progressed in comparison with 19% of patients treated with IdR/BR.
2018-11-01 Gilead Sciences Results Gilead to Present Latest Scientific Research in Hematologic Malignancies and Solid Tumors at ASH 2018 gilead.com ↗
Results From a Prospective Real World Study Show Strong Efficacy of Idelalisib in CLL, Including High-Risk CLL
2015-12-08 Gilead Sciences Results Phase 3 Results for Zydelig® With Bendamustine and Rituximab for Relapsed Chronic Lymphocytic Leukemia (CLL) Presented at American Society of Hematology Annual Meeting gilead.com ↗
Gilead Sciences , Inc. (Nasdaq: GILD) today announced results from a prespecified interim analysis of a Phase 3 study (Study 115) evaluating Zydelig ® (idelalisib) in combination with bendamustine and rituximab (BR) for patients with previously treated CLL.
2015-11-16 Gilead Sciences Results Gilead’s Zydelig® Combined with Bendamustine and Rituximab Shows Superior Efficacy to Bendamustine/Rituximab in Phase 3 Study of Patients with Relapsed Chronic Lymphocytic Leukemia gilead.com ↗
2015-05-31 Gilead Sciences Results Zydelig® in Combination With Ofatumumab Improves Progression-Free Survival in Previously-Treated Patients With Chronic Lymphocytic Leukemia gilead.com ↗
Gilead Sciences, Inc. (Nasdaq:GILD) today announced results from the Phase 3 clinical Study 119 of an investigational use of Zydelig ® (idelalisib) in combination with ofatumumab in previously-treated patients with chronic lymphocytic leukemia (CLL).
2014-12-08 Gilead Sciences Results Gilead Presents Follow-up Data from Zydelig Registrational Studies in Patients with Chronic Lymphocytic Leukemia, Follicular Lymphoma and Small Lymphocytic Lymphoma gilead.com ↗
Gilead Sciences , Inc. (NASDAQ: GILD) today announced long-term follow-up results from the registration studies further describing the duration of response, progression-free survival (PFS) and safety profile for Zydelig ® (idelalisib) in relapsed patients with chronic lymphocytic leukemia (CLL) and two types of indolent non-Hodgkin lymphoma (iNHL).
2014-09-19 Gilead Sciences Regulatory European Commission Grants Marketing Authorization for Gilead’s Zydelig® (Idelalisib) for the Treatment of Chronic Lymphocytic Leukemia and Follicular Lymphoma gilead.com ↗
Gilead Sciences, Inc. (Nasdaq:GILD) today announced that the European Commission has granted marketing authorization for Zydelig ® (idelalisib), 150 mg tablets, a first-in-class oral treatment for two incurable blood cancers - chronic lymphocytic leukemia (CLL) and follicular lymphoma (FL).
2014-07-25 Gilead Sciences Regulatory European CHMP Adopts Positive Opinion for Gilead’s Zydelig® (idelalisib) for the Treatment of Chronic Lymphocytic Leukemia and Follicular Lymphoma gilead.com ↗
Gilead Sciences, Inc. (NASDAQ:GILD) today announced that the Committee for Medicinal Products for Human Use (CHMP), the scientific committee of the European Medicines Agency (EMA), has adopted a positive opinion on the company’s Marketing Authorization Application (MAA) for Zydelig ® (idelalisib 150 mg film-coated tablets), a first-in-class treatment for patients with chronic lymphocytic leukemia (CLL) and follicular lymphoma (FL), the most common subtype of indolent non-Hodgkin lymphoma (iNHL).
2014-07-23 Gilead Sciences Regulatory U.S. Food and Drug Administration Approves Gilead’s Zydelig® (idelalisib) for Relapsed Chronic Lymphocytic Leukemia, Follicular Lymphoma and Small Lymphocytic Lymphoma gilead.com ↗
Gilead Sciences, Inc. (Nasdaq: GILD) today announced that the U.S. Food and Drug Administration ( FDA ) has approved Zydelig ® (idelalisib) 150 mg tablets for the treatment of three B-cell blood cancers.
2014-01-13 Gilead Sciences Regulatory U.S. FDA Accepts New Drug Application for Gilead’s Idelalisib for the Treatment of Refractory Indolent Non-Hodgkin’s Lymphoma gilead.com ↗
2013-12-08 Gilead Sciences Results Gilead Announces Pivotal Phase 2 Data for Idelalisib in Refractory Indolent Non-Hodgkin’s Lymphoma gilead.com ↗
In this study, single-agent treatment with idelalisib achieved an overall response rate of 57 percent with a median duration of response of 12.5 months.
2013-11-18 Gilead Sciences Results Gilead’s Idelalisib Significantly Reduces Rate of Disease Progression or Death in Phase 3 Chronic Lymphocytic Leukemia Study gilead.com ↗
Study 116 Stopped for Positive Efficacy in October; Met Primary Endpoint of Progression-Free Survival and Secondary Endpoints of Overall Response, Lymph Node Response and Overall Survival

All press releases naming this drug 17 releases

DateIssuerRelease

Evidence & citations 12 cited values

Every value below carries the sentence it was read from. 66 sources stand behind the page.

FieldValueCited text
Known as Idelalisib “This research study is evaluating a drug called idelalisib (formerly known as GS-1101 or CAL-101) as a possible treatment for Waldenstrom's Macroglobulinemia (WM).” NCT02439138 ↗
55

“100 mg QD of idelalisib + 100 mg QD of venetoclax” NCT03639324 ↗

NCT02590588 ↗

NCT01838434 ↗

NCT01282424 ↗

NCT02779283 ↗

NCT01539291 ↗

NCT02136511 ↗

NCT02258529 ↗

NCT02639910 ↗

NCT01090414 ↗

Show 45 more sources

Known as CAL-101 “A Study of Idelalisib (GS1101, CAL101) + Ofatumumab in Previously Untreated CLL/SLL” NCT02135133 ↗
5

“phosphatidylinositol 3-kinase delta (PI3K-delta) inhibitor GS-1101 (CAL-101)” NCT01659047 ↗

NCT00836914 ↗

NCT06736990 ↗

NCT02445131 ↗

NCT00710528 ↗

Known as CAL-101 (GS-1101) ChEMBL registry synonym — accepted as the source's own label CHEMBL2216870 ↗
Known as GS-1101 “This research study is evaluating a drug called idelalisib (formerly known as GS-1101 or CAL-101) as a possible treatment for Waldenstrom's Macroglobulinemia (WM).” NCT02439138 ↗
2

“Study of Phosphatidylinositol-3-kinase (PI3K) Inhibitor, Idelalisib (GS-1101), in IgM-Associated AL Amyloid” NCT02590588 ↗

NCT01659047 ↗

Known as GS-11CAL-101 ChEMBL registry synonym — accepted as the source's own label CHEMBL2216870 ↗
Known as IDELA “A randomized, double-blind, phase III study of idelalisib (IDELA) plus rituximab versus placebo plus rituximab in patients with relapsed chronic lymphocytic leukemia (CLL) was...” PMID 30995176 ↗ Apr 2019
1

“Cohort 1a: Idelalisib (IDELA) 100 mg orally twice daily (BID)” NCT01088048 ↗

Known as IDELALISIBCT-CAL101IDEALISIBCAL-101CAL 101GS-1101GS 1101ZYDELIGA-1138CAL101 ChEMBL registry synonym — accepted as the source's own label CHEMBL2216870 ↗
Known as Zydelig ClinicalTrials.gov intervention name — accepted as the source's own label NCT03133221 ↗
Action Inhibit “an oral inhibitor of phosphatidylinositol 3-kinase (PI3K) delta” NCT00836914 ↗
Modality Small molecule “Idelalisib is a small-molecule inhibitor of PI3Kδ” PMID 27247136 ↗ May 2016
Route Oral “administered orally” NCT00836914 ↗
Target PIK3CD “The phosphatidylinositol-3-kinase delta (PI3Kδ) inhibitor idelalisib” PMID 28327905 ↗ May 2017