CALQUENCE® (acalabrutinib) plus chemoimmunotherapy approved in the US for patients with previously untreated mantle cell lymphoma

Rhea-AI Summary

AstraZeneca's CALQUENCE (acalabrutinib) in combination with bendamustine and rituximab has received FDA approval for treating previously untreated mantle cell lymphoma (MCL) in adult patients ineligible for autologous stem cell transplantation. The approval was based on the ECHO Phase III trial results, which demonstrated a 27% reduction in disease progression or death risk compared to standard chemoimmunotherapy.

The trial showed median progression-free survival of 66.4 months for the CALQUENCE combination versus 49.6 months with chemoimmunotherapy alone. After censoring COVID-19 deaths, the risk reduction improved to 36%. This makes CALQUENCE the first and only BTK inhibitor approved for first-line MCL treatment in the US.

MCL is a rare and aggressive form of non-Hodgkin lymphoma, with over 21,000 patients diagnosed across major markets. The safety profile was consistent with known data, and no new safety signals were identified.

Positive

• FDA approval for first-line MCL treatment, expanding market potential
• 16.8 months improvement in progression-free survival (66.4 vs 49.6 months)
• 27% reduction in disease progression or death risk (36% after COVID-19 censoring)
• First and only BTK inhibitor approved for first-line MCL treatment in US

Negative

• 69% of patients experienced serious adverse reactions
• 43% of patients discontinued CALQUENCE due to adverse reactions
• 12% fatal adverse reactions within 30 days of last treatment

Insights

Oncology Research Analyst

The FDA approval of CALQUENCE® in combination with chemoimmunotherapy represents a significant advancement in MCL treatment. The 16-month improvement in progression-free survival (PFS) from 49.6 to 66.4 months demonstrates exceptional clinical benefit. The 27% reduction in disease progression risk (HR 0.73) becomes even more impressive at 36% when accounting for COVID-19 deaths.

The pivotal ECHO trial data shows particularly strong outcomes for elderly patients ineligible for stem cell transplantation - a historically challenging-to-treat population. This positions CALQUENCE as the first and only BTK inhibitor approved for first-line MCL treatment in the US, addressing an important unmet need in this rare but aggressive lymphoma affecting approximately 4,000 new US patients annually.

Market Research Analyst

This approval significantly strengthens AstraZeneca's position in the hematologic malignancies market. CALQUENCE has already treated over 85,000 patients globally and this expanded indication in first-line MCL treatment opens up substantial new market opportunities. The Priority Review status and Project Orbis framework involvement suggest accelerated commercial potential across multiple regions.

With pending applications in the EU, Japan and other markets, AstraZeneca is poised to capture a larger share of the global MCL market, estimated at over 21,000 patients across major markets. The strong efficacy data and favorable safety profile should drive rapid adoption, particularly given the lack of other BTK inhibitors approved in this first-line setting.

Financial Analyst

This approval represents a major catalyst for AstraZeneca's hematology portfolio growth. CALQUENCE's expanded label in first-line MCL treatment could drive significant revenue expansion, given the high unmet need and lack of competing BTK inhibitors in this setting. The robust survival data and established safety profile should support strong market uptake and payer coverage.

The global commercial opportunity is substantial, with potential for further upside as additional regulatory approvals come through in key markets like the EU and Japan. This strengthens AstraZeneca's competitive position in blood cancers and supports the company's broader oncology growth strategy. The stock should react positively to this news given the meaningful market opportunity and strong clinical data.

Based on ECHO Phase III trial results which showed more than 16 months of progression-free survival improvement vs. chemoimmunotherapy alone

First and only BTK inhibitor approved for the 1st-line treatment of MCL in the US

WILMINGTON, Del.--(BUSINESS WIRE)-- AstraZeneca’s CALQUENCE^® (acalabrutinib) in combination with bendamustine and rituximab has been approved in the US for the treatment of adult patients with previously untreated mantle cell lymphoma (MCL) who are ineligible for autologous hematopoietic stem cell transplantation.

The approval was granted by the Food and Drug Administration (FDA) after securing Priority Review. It was based on results from the ECHO Phase III trial which were presented at the European Hematology Association 2024 Congress.

MCL is a rare and typically aggressive form of non-Hodgkin lymphoma (NHL), often diagnosed at an advanced stage.^1,2 It is estimated that there are more than 21,000 patients diagnosed with MCL in the US, UK, France, Germany, Spain, Italy, Japan and China.³

Michael Wang, MD, Puddin Clarke Endowed Professor, Director of Mantle Cell Lymphoma Program of Excellence and principal investigator in the trial, said: “Managing this aggressive cancer requires maximizing efficacy while maintaining tolerability, especially for elderly patients. Results from the pivotal ECHO trial highlight the promise of the acalabrutinib combination in defining a new standard of care, with today’s approval underscoring the transformative potential of this regimen as a first-line treatment for older patients with mantle cell lymphoma.”

Dave Fredrickson, Executive Vice President, Oncology Business Unit, AstraZeneca, said: “With today’s approval, CALQUENCE provides a critical new treatment option to mantle cell lymphoma patients in the US, with CALQUENCE proven to deliver nearly one and a half years of additional time without disease progression. This approval brings a new and effective treatment option to those living with this disease and further reinforces our belief in CALQUENCE as a backbone therapy across multiple blood cancers.”

Meghan Gutierrez, Chief Executive Officer, Lymphoma Research Foundation, said: “New treatment options have long been needed in the first-line treatment of mantle cell lymphoma in the US. Patients with this rare and often aggressive cancer can experience severe symptoms by the time they are diagnosed - having an effective therapy that can significantly improve outcomes for patients early in the treatment process is a much-needed advancement.”

Results from the ECHO trial showed CALQUENCE plus bendamustine and rituximab reduced the risk of disease progression or death by 27% compared to standard-of-care chemoimmunotherapy (hazard ratio [HR] 0.73; 95% confidence interval [CI] 0.57-0.94; p=0.016). Median PFS was 66.4 months for patients treated with the CALQUENCE combination versus 49.6 months with chemoimmunotherapy alone.

This approval additionally converts CALQUENCE’s accelerated approval to a full approval for adult patients with MCL treated with at least one prior therapy, as granted by the FDA in October 2017.

The ECHO trial enrolled patients throughout the COVID-19 pandemic. After censoring for COVID-19 deaths, PFS was further improved in both arms, with the CALQUENCE combination reducing the risk of disease progression or death by 36% (HR 0.64; 95% CI 0.48-0.84). Although OS data were not mature at the time of the analysis, when censored for COVID-19, a favorable trend was seen for OS (HR 0.75; 95% CI 0.53-1.04), despite 69% of patients in the chemoimmunotherapy arm receiving treatment with a BTK inhibitor on relapse or disease progression.

The safety and tolerability of CALQUENCE was consistent with its known safety profile, and no new safety signals were identified.

The US regulatory submission was reviewed under Project Orbis, which provides a framework for concurrent submission and review of oncology medicines among participating international partners. As part of Project Orbis, CALQUENCE plus chemoimmunotherapy is also under review by regulatory authorities in Australia, Canada, and Switzerland for the same indication. Regulatory applications are also under review in the EU, Japan, and other countries based on the ECHO results.

INDICATIONS AND USAGE

CALQUENCE is a Bruton tyrosine kinase (BTK) inhibitor indicated in combination with bendamustine and rituximab (BR) for the treatment of adult patients with previously untreated mantle cell lymphoma (MCL) who are ineligible for autologous hematopoietic stem cell transplantation (HSCT), as monotherapy for the treatment of adult patients with MCL who have received at least one prior therapy, and for the treatment of adult patients with chronic lymphocytic leukemia (CLL) or small lymphocytic lymphoma (SLL).

IMPORTANT SAFETY INFORMATION ABOUT CALQUENCE® (acalabrutinib) tablets

Serious and Opportunistic Infections
Fatal and serious infections, including opportunistic infections, have occurred in patients with hematologic malignancies treated with CALQUENCE.

Serious or Grade 3 or higher infections (bacterial, viral, or fungal) occurred in 32% of 1,764 patients exposed to CALQUENCE in clinical trials, most often due to respiratory tract infections (19% of all patients, including pneumonia in 9%). These infections predominantly occurred in the absence of Grade 3 or 4 neutropenia, with neutropenic infection reported in 2.7% of all patients. Opportunistic infections in recipients of CALQUENCE have included, but are not limited to, hepatitis B virus reactivation, fungal pneumonia, Pneumocystis jirovecii pneumonia, Epstein-Barr virus reactivation, cytomegalovirus, and progressive multifocal leukoencephalopathy (PML). Consider prophylaxis in patients who are at increased risk for opportunistic infections. Monitor patients for signs and symptoms of infection and treat promptly.

Hemorrhage
Fatal and serious hemorrhagic events have occurred in patients treated with CALQUENCE. Major hemorrhage (serious or Grade 3 or higher bleeding or any central nervous system bleeding) occurred in 4.4% of patients, with fatal hemorrhage occurring in 0.2% of 1,764 patients exposed to CALQUENCE in clinical trials. Bleeding events of any grade, excluding bruising and petechiae, occurred in 40% of patients.

Use of antithrombotic agents concomitantly with CALQUENCE may further increase the risk of hemorrhage. In clinical trials, major hemorrhage occurred in 7% of patients taking CALQUENCE without antithrombotic agents and 4% of patients taking CALQUENCE with antithrombotic agents. Consider the risks and benefits of antithrombotic agents when co-administered with CALQUENCE. Monitor patients for signs of bleeding.

Consider the benefit-risk of withholding CALQUENCE for 3 to 7 days pre- and post-surgery depending upon the type of surgery and the risk of bleeding.

Cytopenias
CALQUENCE can cause Grade 3 or 4 cytopenias. Grade 3 or 4 cytopenias included absolute neutrophil count decreased (26%), platelets decreased (10%), hemoglobin decreased (10%), and absolute lymphocyte count decreased (10%) in patients treated with CALQUENCE alone or in combination with obinutuzumab; Grade 4 neutropenia developed in 14% of patients.

Monitor complete blood counts regularly during treatment. Interrupt treatment, reduce the dose, or discontinue treatment as warranted.

Second Primary Malignancies
Second primary malignancies, including skin cancers and other solid tumors, occurred in 18% of 1,764 patients exposed to CALQUENCE in clinical trials. The most frequent second primary malignancy was non-melanoma skin cancer, reported in 10% of patients, followed by other solid tumors in 9% (including melanoma, lung cancer, gastrointestinal cancers, and genitourinary cancers) and hematologic malignancies (1%). Monitor patients for the development of second cancers and advise protection from sun exposure.

Cardiac Arrhythmias
Fatal and serious cardiac arrhythmias have occurred in patients treated with CALQUENCE. Grade 3 or 4 atrial fibrillation or flutter was reported in 2.6% of 1,764 patients treated with CALQUENCE, with all grades of atrial fibrillation or flutter reported in 7% of all patients. Grade 3 or higher ventricular arrhythmia events were reported in 0.6% of patients, including fatal cases in 0.3% of all patients. The risk of arrhythmias may be increased in patients with cardiac risk factors, hypertension, previous arrhythmias, and acute infection. Monitor for symptoms of arrhythmia (eg, palpitations, dizziness, syncope, dyspnea) and manage as appropriate.

Hepatotoxicity, Including Drug-Induced Liver Injury
Hepatotoxicity, including severe, life-threatening, and potentially fatal cases of drug-induced liver injury (DILI), has occurred in patients treated with Bruton tyrosine kinase inhibitors, including CALQUENCE.

Evaluate bilirubin and transaminases at baseline and throughout treatment with CALQUENCE. For patients who develop abnormal liver tests after CALQUENCE, monitor more frequently for liver test abnormalities and clinical signs and symptoms of hepatic toxicity. If DILI is suspected, withhold CALQUENCE. Upon confirmation of DILI, discontinue CALQUENCE.

ADVERSE REACTIONS

Previously Untreated Mantle Cell Lymphoma
The most common adverse reactions (≥15%) of any grade in patients with previously untreated MCL who received CALQUENCE plus BR were rash (47%), COVID-19 (38%), fatigue (37%), diarrhea (37%), pneumonia (31%), headache (31%), upper respiratory tract infection (30%), pyrexia (29%), cough (27%), vomiting (26%), constipation (25%), hemorrhage (20%), edema (20%), secondary primary malignancy (19%), dizziness (18%), arthralgia (18%), and dyspnea (17%).

Grade 4 laboratory abnormalities in >15% of patients treated with CALQUENCE plus BR include lymphocytes decreased (26%), absolute neutrophils decreased (36%), and uric acid increased (17%).

Serious adverse reactions occurred in 69% of patients who received CALQUENCE plus BR. Serious adverse reactions reported in ≥2% of patients were pneumonia (23%; includes COVID-19 pneumonia), COVID-19 (20%; includes COVID-19 pneumonia), second primary malignancy (7%), pyrexia (6%), rash (3.4%), febrile neutropenia (3.4%), atrial fibrillation (3%), sepsis (2.7%), and anemia (2.4%). Fatal adverse reactions that occurred within 30 days of the last study treatment were reported in 12% who received CALQUENCE plus BR including COVID-19 (6%; includes COVID-19 pneumonia), pneumonia (1%), second primary malignancy (0.7%), sepsis (0.3%), and pneumonitis (0.3%).

Adverse reactions led to permanent discontinuation of CALQUENCE in 43%, dosage interruptions in 74%, and dosage reductions in 10% of patients. Adverse reactions that resulted in dosage modification in >10% included infections, cytopenias, rashes, and gastrointestinal toxicity. Adverse reactions which resulted in permanent discontinuation of CALQUENCE in ≥4% of patients included COVID-19 (includes COVID-19 pneumonia) and neutropenia.

Previously Treated Mantle Cell Lymphoma
The most common adverse reactions (≥20%) of any grade in patients with relapsed or refractory MCL exposed to CALQUENCE were anemia,* thrombocytopenia,* headache (39%), neutropenia,* diarrhea (31%), fatigue (28%), myalgia (21%), and bruising (21%). The most common Grade ≥3 non-hematological adverse reaction (reported in at least 2% of patients) was diarrhea (3.2%).

*Treatment-emergent decreases (all grades) of hemoglobin (46%), platelets (44%), and neutrophils (36%) were based on laboratory measurements and adverse reactions.

Dose reductions or discontinuations due to any adverse reaction were reported in 1.6% and 6.5% of patients, respectively. Increases in creatinine to 1.5 to 3 times the upper limit of normal (ULN) occurred in 4.8% of patients.

Chronic Lymphocytic Leukemia
The most common adverse reactions (≥30%) of any grade in patients with CLL exposed to CALQUENCE were anemia,* neutropenia,* thrombocytopenia,* headache, upper respiratory tract infection, and diarrhea.

*Treatment-emergent decreases (all grades) of hemoglobin, platelets, and neutrophils were based on laboratory measurements and adverse reactions.

In patients with previously untreated CLL exposed to CALQUENCE, fatal adverse reactions that occurred in the absence of disease progression and with onset within 30 days of the last study treatment were reported in 2% for each treatment arm, most often from infection. Serious adverse reactions were reported in 39% of patients in the CALQUENCE plus obinutuzumab arm and 32% in the CALQUENCE monotherapy arm, most often due to events of pneumonia (2.8% to 7%).

Adverse reactions led to CALQUENCE dose reduction in 7% and 4% of patients in the CALQUENCE plus obinutuzumab arm (N=178) and CALQUENCE monotherapy arm (N=179), respectively. Adverse events led to discontinuation in 11% and 10% of patients, respectively. Increases in creatinine to 1.5 to 3 times ULN occurred in 3.9% and 2.8% of patients in the CALQUENCE combination arm and monotherapy arm, respectively.

In patients with relapsed/refractory CLL exposed to CALQUENCE, serious adverse reactions occurred in 29% of patients. Serious adverse reactions in >5% of patients who received CALQUENCE included lower respiratory tract infection (6%). Fatal adverse reactions within 30 days of the last dose of CALQUENCE occurred in 2.6% of patients, including from second primary malignancies and infection.

Adverse reactions led to CALQUENCE dose reduction in 3.9% of patients (N=154), dose interruptions in 34% of patients, most often due to respiratory tract infections followed by neutropenia, and discontinuation in 10% of patients, most frequently due to second primary malignancies followed by infection. Increases in creatinine to 1.5 to 3 times ULN occurred in 1.3% of patients who received CALQUENCE.

DRUG INTERACTIONS

Strong CYP3A Inhibitors: Avoid co-administration of CALQUENCE with a strong CYP3A inhibitor. If these inhibitors will be used short-term, interrupt CALQUENCE. After discontinuation of strong CYP3A inhibitor for at least 24 hours, resume previous dosage of CALQUENCE.

Moderate CYP3A Inhibitors: Reduce the dosage of CALQUENCE to 100 mg once daily when co-administered with a moderate CYP3A inhibitor.

Strong CYP3A Inducers: Avoid co-administration of CALQUENCE with a strong CYP3A inducer. If co-administration is unavoidable, increase the dosage of CALQUENCE to 200 mg approximately every 12 hours.

SPECIFIC POPULATIONS

Based on findings in animals, CALQUENCE may cause fetal harm and dystocia when administered to a pregnant woman. There are no available data in pregnant women to inform the drug-associated risk. Advise pregnant women of the potential risk to a fetus.

Pregnancy testing is recommended for females of reproductive potential prior to initiating CALQUENCE therapy. Advise female patients of reproductive potential to use effective contraception during treatment with CALQUENCE and for 1 week following the last dose of CALQUENCE.

It is not known if CALQUENCE is present in human milk. Advise lactating women not to breastfeed while taking CALQUENCE and for 2 weeks after the last dose.

Avoid use of CALQUENCE in patients with severe hepatic impairment (Child-Pugh class C). No dosage adjustment of CALQUENCE is recommended in patients with mild (Child-Pugh class A) or moderate (Child-Pugh class B) hepatic impairment.

Please see full Prescribing Information, including Patient Information.

Notes

Mantle cell lymphoma
While MCL patients initially respond to treatment, patients do tend to relapse.⁴ MCL comprises about 3-6% of non-Hodgkin lymphomas, with an annual incidence of 0.5 per 100,000 population in Western countries; in the US, it is estimated that approximately 4,000 new patients are diagnosed with MCL each year.^4,5

ECHO
ECHO is a randomized, double-blind, placebo-controlled, multi-center Phase III trial evaluating the efficacy and safety of CALQUENCE plus bendamustine and rituximab compared to SoC chemoimmunotherapy (bendamustine and rituximab) in adult patients at or over 65 years of age (n=635) with previously untreated MCL.⁶ Patients were randomized 1:1 to receive either CALQUENCE or placebo administered orally twice per day, continuously, until disease progression or unacceptable toxicity. Additionally, all patients received six 28-day cycles of bendamustine on days 1 and 2 and rituximab on day 1 of each cycle, followed by rituximab maintenance for two years if patients achieved a response after induction therapy.⁶

The primary endpoint is PFS assessed by an Independent Review Committee; other efficacy endpoints include OS, overall response rate (ORR), duration of response (DoR) and time to response (TTR).⁶ The trial was conducted in 27 countries across North and South America, Europe, Asia and Oceania.⁶

The ECHO trial enrolled patients from May 2017 to March 2023, continuing through the COVID-19 pandemic. Prespecified PFS and OS analyzes censoring for COVID-19 deaths were conducted to assess the impact of COVID-19 on the study outcome in alignment with the FDA. Patients with blood cancer remain at a disproportionately high risk of severe outcomes from COVID-19, including hospitalization and death compared to the general population.^6,7

CALQUENCE
CALQUENCE (acalabrutinib) is a second-generation, selective inhibitor of Bruton’s tyrosine kinase (BTK). CALQUENCE binds covalently to BTK, thereby inhibiting its activity.⁸ In B-cells, BTK signaling results in activation of pathways necessary for B-cell proliferation, trafficking, chemotaxis and adhesion.

CALQUENCE has been used to treat more than 85,000 patients worldwide⁹ and is approved for the treatment of chronic lymphocytic leukemia (CLL) and small lymphocytic lymphoma (SLL) in the US and Japan, approved for CLL in the EU and many other countries worldwide and approved in China for relapsed or refractory CLL and SLL. CALQUENCE is also approved for the treatment of adult patients with previously untreated MCL in the US, and in China and several other countries for the treatment of adult patients with mantle cell lymphoma (MCL) who have received at least one prior therapy. CALQUENCE is not currently approved for the treatment of MCL in Japan or the EU.

As part of an extensive clinical development program, CALQUENCE is currently being evaluated as a single treatment and in combination with standard-of-care chemoimmunotherapy for patients with multiple B-cell blood cancers, including CLL, MCL and diffuse large B-cell lymphoma.

AstraZeneca in hematology
AstraZeneca is pushing the boundaries of science to redefine care in hematology. Our goal is to help transform the lives of patients living with malignant, rare and other related hematologic diseases through innovative medicines and approaches that are shaped by insights from patients, caregivers and physicians.

In addition to our marketed products, we are spearheading the development of novel therapies designed to target underlying drivers of disease across multiple scientific platforms. Our acquisitions of Alexion, with expertise in rare, non-malignant blood disorders, and Gracell Biotechnologies Inc., pioneers of autologous cell therapies, expand our hematology pipeline and enable us to reach more patients with high unmet needs through the end-to-end discovery, development and delivery of novel therapies.

AstraZeneca in oncology
AstraZeneca is leading a revolution in oncology with the ambition to provide cures for cancer in every form, following the science to understand cancer and all its complexities to discover, develop and deliver life-changing medicines to patients.

The Company's focus is on some of the most challenging cancers. It is through persistent innovation that AstraZeneca has built one of the most diverse portfolios and pipelines in the industry, with the potential to catalyze changes in the practice of medicine and transform the patient experience.

AstraZeneca has the vision to redefine cancer care and, one day, eliminate cancer as a cause of death.

AstraZeneca

AstraZeneca is a global, science-led biopharmaceutical company that focuses on the discovery, development, and commercialization of prescription medicines in Oncology, Rare Diseases, and BioPharmaceuticals, including Cardiovascular, Renal & Metabolism, and Respiratory & Immunology. Based in Cambridge, UK, AstraZeneca operates in over 125 countries, and its innovative medicines are used by millions of patients worldwide. For more information, please visit astrazeneca-us.com and follow us on social media @AstraZeneca.

References

1. Lymphoma Research Foundation. Mantle Cell Lymphoma. Accessed January 2025. https://lymphoma.org/aboutlymphoma/nhl/mcl/
2. National Organization for Rare Disorders. Mantle Cell Lymphoma. Accessed January 2025. Available at: https://rarediseases.org/rare-diseases/mantle-cell-lymphoma/
3. AstraZeneca 2024. Q3 2024 Financial Results. Accessed January 2025. https://www.astrazeneca.com/investor-relations.html
4. Cheah C, Seymour J, Wang ML. Mantle cell lymphoma. J Clin Oncol. 2016;34(11):1256-1269. doi: 10.1200/JCO.2015.63.5904.
5. MD Anderson Cancer Center. What to know about mantle cell lymphoma. Accessed January 2025. https://www.mdanderson.org/cancerwise/what-to-know-about-mantle-cell-lymphoma-symptoms-diagnosis-and-treatment.h00-159385101.html
6. ClinicalTrials.gov. A Study of BR Alone Versus in Combination With Acalabrutinib in Subjects With Previously Untreated MCL. Accessed January 2025. https://clinicaltrials.gov/study/NCT02972840
7. Dube S, et al. Continued Increased Risk of COVID-19 Hospitalization and Death in Immunocompromised Individuals Despite Receipt of ≥4 Vaccine Doses: Updated 2023 Results from INFORM, a Retrospective Health Database Study in England. Poster P0409 at ECCMID 2024.
8. Wu J, Zhang M, Liu D. Acalabrutinib (ACP-196): a selective second-generation BTK inhibitor. J Hematol Oncol. 2016;9(21).
9. Data on File, REF-236261. AstraZeneca Pharmaceuticals LP.

US-48947 Last Updated 1/25

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FAQ

What are the ECHO Phase III trial results for AZN's CALQUENCE in MCL treatment?

The ECHO Phase III trial showed CALQUENCE plus bendamustine and rituximab reduced disease progression or death risk by 27% compared to standard chemoimmunotherapy, with median PFS of 66.4 months versus 49.6 months.

What is the significance of AZN's CALQUENCE FDA approval for MCL?

CALQUENCE becomes the first and only BTK inhibitor approved for first-line MCL treatment in the US, offering a new treatment option for previously untreated MCL patients ineligible for stem cell transplantation.

What are the major side effects of AZN's CALQUENCE in MCL treatment?

Serious adverse reactions occurred in 69% of patients, with 43% discontinuing treatment. Common side effects include rash (47%), fatigue (37%), diarrhea (37%), and pneumonia (31%).

How does COVID-19 impact the effectiveness of AZN's CALQUENCE in MCL treatment?

After censoring COVID-19 deaths, CALQUENCE's effectiveness improved, showing a 36% reduction in disease progression or death risk compared to the initial 27%.