A Phase 2/3 interventional study of rilzabrutinib and placebo in Immunodeficiency Common Variable, sponsored by Sanofi. Not yet recruiting. Open to participants aged 18 Years to 75 Years. Per ClinicalTrials.gov, last updated 2026-11-06.
Sponsored by Sanofi · Phase 2/3, Interventional, and Treatment
This is a 4-part study where both Part A and Part B, which starts after the completion of Part A, are randomized (2:1), double-blinded, placebo-controlled studies, followed by an open label (Part C) and long-term extension period (Part D), phase 2 and 3 study, designed to evaluate the efficacy, safety, tolerability, pharmacokinetics, and pharmacodynamics of rilzabrutinib in adult patients with iCVID.
In Part A, all participants will have iCVID associated ILD and at least one additional inflammatory/ autoimmune complication (cytopenia [thrombocytopenia, anemia] and/or lymphoproliferative disease [splenomegaly, lymphoid hyperplasia]). At the completion of 24 weeks in Part A, participants will be assessed to the predefined No Response Citeria and may elect to discontinue the DB period (Part A) and enter the OL period (Part C).
Alternatively, for Part B, all participants will have CVID associated with at least one of the following: ILD, other inflammatory/ autoimmune complications (cytopenia, lymphoproliferative disease).
Part A: 32-week DB treatment of rilzabrutinib or placebo. Part B: 32-week DB treatment of rilzabrutinib or placebo. Part C: 32-week OL treatment of rilzabrutinib. Part D: OL treatment of rilzabrutinib until the last-patient-in (LPI- Part D) completes 52 weeks of treatment.
54 studies on the registry are indexed under Common Variable Immunodeficiency; 13 are open to participants now.
This study's planned enrollment of 96 is above the median of 40 across 39 interventional studies indexed under Common Variable Immunodeficiency.
Browse Common Variable Immunodeficiency studies →Sanofi is the lead sponsor of 1,557 studies on the registry; 91 are open to participants now.
Of its 205 completed or terminated interventional studies of FDA-regulated products, 123 (60%) have results posted.
Counted across the registry records on this site, refreshed daily.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion criteria
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
A scale of how much an illness limits everyday activity. For people being assessed to join a study, scores run from 0 (fully active) to 4; lower is more active.
Studies most often ask for 0–1 or 0–2. Your doctor gives the score; the WHO scale uses the same steps. The full scale also has 5, which records death.
Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.
Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.
Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.
Relapsed: the illness came back after treatment had worked. Refractory: it did not respond to treatment, or stopped responding while still on it.
A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.
Read whether the line is about a condition or about medicines, and which medicines and doses it means.
Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.
Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.
ECOG performance status
A scale of how much an illness limits everyday activity. For people being assessed to join a study, scores run from 0 (fully active) to 4; lower is more active.
Studies most often ask for 0–1 or 0–2. Your doctor gives the score; the WHO scale uses the same steps. The full scale also has 5, which records death.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Contraception
Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.
Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Clinically significant
Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Relapsed and refractory
Relapsed: the illness came back after treatment had worked. Refractory: it did not respond to treatment, or stopped responding while still on it.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Immunosuppression
A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.
Read whether the line is about a condition or about medicines, and which medicines and doses it means.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Corticosteroids (steroids)
Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.
Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
rilzabrutinib
Drug: rilzabrutinib
placebo
Drug: placebo
Oral tablet
Oral tablet
Proportion of participants with iCVID who meet any responder definitions
In participants with ILD at baseline, a responder is defined as achieving a clinically meaningful response at Week 32. In participants with cytopenia (thrombocytopenia, anemia) at baseline, a responder is defined as achieving therapeutic efficacy at Week 32, defined as Durable platelet response or Durable hemoglobin response (DHR) between W16 and W32, and no rescue medication for thrombocytopenia is taken at any time. In participants with lymphoproliferative disease (splenomegaly or lymphoid hyperplasia) at baseline, a responder is defined as achieving therapeutic efficacy by Week 32.
Time frame: At Week 32
Change from baseline in FACIT-Fatigue total score at Week 24 in Part A and Week 32 in Part B
Time frame: At Week 24 in Part A and Week 32 in Part B
Percent change from baseline in FVC% predicted at Week 32
Time frame: At Week 32
Percent change from baseline in diffusing capacity of the lung for carbon monoxide at Week 32
Time frame: At Week 32
Change from baseline in FACIT-dyspnea severity score at Week 24 in Part A and Week 32 in Part B
Time frame: At Week 24 in Part A and Week 32 in Part B
Change from baseline in time spend in moderate to vigorous physical activity measured with a wearable device
Time frame: At Week 32
Incidence of treatment-emergent adverse events (TEAE), serious AEs (SAE), TEAE leading to permanent discontinuation, adverse events of special interest (AESI)
including clinical laboratory evaluations, vital sign measurements, and electrocardiograms
Time frame: Until Week 116 of LPI for Part D
No study locations are listed for this record.
Plan to share: Yes — Qualified researchers may request access to patient level data and related study documents including the clinical study report, study protocol with any amendments, blank case report form, statistical analysis plan, and dataset specifications. Patient level data will be anonymized and study documents will be redacted to protect the privacy of trial participants. Further details on Sanofi's data sharing criteria, eligible studies, and process for requesting access can be found at: https://vivli.org
No publications or documents are linked to this record.
From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗
This study is not yet recruiting, as verified in Nov 2026. You cannot join it, but the record below documents what was studied.
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Studies of the drug tested here: Rilzabrutinib
Common Variable Immunodeficiency →