Acute Myeloid Leukemia with Myelodysplasia-Related Changes

New trial results of investigational bispecific antibody zanidatamab presented at SABCS in HER2+/HR+ metastatic breast cancer Strong presence at ASH includes 11 presentations spanning Jazz's portfolio, advancing research into difficult-to-treat blood cancers and diseases Real-world data at NACLC reinforce clinical impact of Zepzelca® (lurbinectedin) in small cell lung cancer DUBLIN, Nov. 30, 2023 /PRNewswire/ -- Jazz Pharmaceuticals plc (Nasdaq: JAZZ) today announced that the Company and its partners will present two abstracts at the 2023 San Antonio Breast Cancer Symposium (SABCS) from December 5-9; 11 abstracts at the 65th Annual American Society of Hematology (ASH) Annual Meeting from December 9-12; and two abstracts at the International Association for the Study of Lung Cancer (IASLC) 2023 North America Conference on Lung Cancer (NACLC) from December 1-3. New data include updated findings from a Phase 2a trial of the investigational HER2-targeted bispecific antibody zanidatamab in combination with palbociclib and fulvestrant as a chemotherapy-free option for HER2+/ HR+ metastatic breast cancer (mBC). "Following recent trial results showing the potential of zanidatamab to treat HER2-expressing gastric and biliary tract cancers at ASCO GI, ASCO and ESMO this year, we're excited to share updated data at SABCS in HER2-amplified and hormone receptor-positive metastatic breast cancer when zanidatamab is used in combination to target the HER2, CDK4/6 and hormone receptor pathways," said Rob Iannone, M.D., M.S.C.E., executive vice president, global head of research and development of Jazz Pharmaceuticals. "SABCS will also feature data from a trial of zanidatamab in neoadjuvant breast cancer. Additionally, we look forward to sharing new data through numerous presentations at ASH 2023 that underscore our commitment to improving standards of care in blood cancer and other hematologic diseases, as well as real-world findings at NACLC that provide evidence of Zepzelca's safety in clinical practice for the treatment of second-line small cell lung cancer." Notable presentations at this year's SABCS, ASH and NACLC meetings include: A SABCS oral presentation (late-breaking abstract) featuring primary results from a Phase 2a study for a chemotherapy-free option in heavily pretreated patients with HER2+/HR+ mBC treated with the combination of zanidatamab plus palbociclib and fulvestrant. An investigator-sponsored (MD Anderson Cancer Center) SABCS poster presentation featuring results of a Phase 1 trial evaluating neoadjuvant zanidatamab in patients with stage 1 node-negative HER2+ breast cancer as a single-agent chemotherapy-free option. An ASH poster presentation of the complete pivotal, Phase 2/3 trial results of Rylaze® (asparaginase erwinia chrysanthemi (recombinant)-rywn) in acute lymphoblastic leukemia (ALL) or lymphoblastic lymphoma (LBL), which includes efficacy, safety and population pharmacokinetic modeling from intramuscular (IM) and intravenous (IV) dosing. The combination of observed and modeled results demonstrates Rylaze achieved therapeutic nadir serum asparaginase activity (NSAA) levels in the vast majority of patients via multiple dosing schedules with a safety profile consistent with prior studies and no new safety signals identified. Treatment‐related adverse events (TRAEs) ≥ grade 3 occurred in 126/228 (55%) patients with no TRAEs that led to death.1 Two NACLC poster presentations of real-world data for Zepzelca® (lurbinectedin) in the second-line and later settings for the treatment of small cell lung cancer (SCLC). The Jazz and partner-supported presentations at SABCS 2023 are: Zanidatamab Presentations The Jazz-supported presentations at the 2023 ASH Annual Meeting are: Rylaze Presentations Asparaginase Collaboration Studies Vyxeos Presentations Defitelio Presentations The Jazz-supported presentations at NACLC 2023 are: Zepzelca Presentations About Zanidatamab Zanidatamab is an investigational bispecific antibody that can simultaneously bind two non-overlapping epitopes of HER2, known as biparatopic binding. This unique design results in multiple mechanisms of action including dual HER2 signal blockade, increased binding and removal of HER2 protein from the cell surface, and immune-mediated cytotoxicity leading to encouraging antitumor activity in patients. Zanidatamab is being developed in multiple clinical trials as a targeted treatment option for patients with solid tumors that express HER2. Zanidatamab is being developed by Jazz and BeiGene, Ltd. (BeiGene) under license agreements from Zymeworks, which first developed the molecule. The U.S. Food and Drug Administration (FDA) has granted Breakthrough Therapy designation for zanidatamab in patients with previously treated HER2 gene-amplified biliary tract cancers (BTC), and two Fast Track designations for zanidatamab: one as a single agent for refractory BTC and one in combination with standard of care chemotherapy for first-line gastroesophageal adenocarcinoma (GEA). Additionally, zanidatamab has received Orphan Drug designations from FDA for the treatment of BTC and GEA, as well as Orphan Drug designation from the European Medicines Agency for the treatment of BTC and gastric cancer. Zanidatamab was also granted Breakthrough Therapy designation from the Center for Drug Evaluation (CDE) in China. About RYLAZE ® (asparaginase erwinia chrysanthemi (recombinant)-rywn) RYLAZE, also known as JZP458, is approved in the U.S. for use as a component of a multi-agent chemotherapeutic regimen for the treatment of acute lymphoblastic leukemia (ALL) and lymphoblastic lymphoma (LBL) in adult and pediatric patients one month or older who have developed hypersensitivity to E. coli-derived asparaginase. RYLAZE has orphan drug designation for the treatment of ALL/LBL in the United States. RYLAZE, or recombinant Erwinia is a short-acting distinct asparaginase derived from a novel Pseudomonas fluorescens expression platform to help ensure robustness of supply to meet patient needs. JZP458 was granted Fast Track designation by the U.S. Food and Drug Administration (FDA) in October 2019 for the treatment of this patient population. RYLAZE was approved as part of the Real-Time Oncology Review program, an initiative of the FDA's Oncology Center of Excellence designed for efficient delivery of safe and effective cancer treatments to patients.2 The full U.S. Prescribing Information for RYLAZE is available at: Important Safety Information for Rylaze RYLAZE should not be given to people who have had: Serious allergic reactions to RYLAZE Serious swelling of the pancreas (stomach pain), serious blood clots, or serious bleeding during previous asparaginase treatment RYLAZE may cause serious side effects, including: Allergic reactions (a feeling of tightness in your throat, unusual swelling/redness in your throat and/or tongue, or trouble breathing), some of which may be life-threatening Swelling of the pancreas (stomach pain), which, if left untreated, may be fatal Blood clots (may be experienced as headache, arm or leg swelling, shortness of breath, or chest pain), which may be life-threatening Bleeding, which may be life-threatening Liver problems Contact your doctor immediately if any of these side effects occur. Some of the most common side effects with RYLAZE include: liver problems, nausea and vomiting, bone and muscle pain, infection, tiredness, headache, fever with low white blood cell count, fever, bleeding, mouth swelling (sometimes with sores), pain in the abdomen, decreased appetite, allergic reactions, high blood sugar levels, diarrhea, swelling of the pancreas, and low levels of potassium in your blood. RYLAZE can harm your unborn baby. Inform your doctor if you are pregnant, planning to become pregnant, or nursing. Females of reproductive potential should use effective contraception (other than hormonal contraceptives) during treatment and for 3 months following the final dose. Do not breastfeed while receiving RYLAZE and for 1 week after the final dose. Tell your healthcare provider if there are any side effects that are bothersome or that do not go away. These are not all the possible side effects of RYLAZE. For more information, ask your healthcare provider. Call your doctor for medical advice about any side effects. You are encouraged to report negative side effects of prescription drugs to the FDA. Visit or call 1-800-FDA-1088 (1-800-332-1088). About Vyxeos ® (daunorubicin and cytarabine) liposome for injection Vyxeos is a liposomal combination of daunorubicin, an anthracycline topoisomerase inhibitor, and cytarabine, a nucleoside metabolic inhibitor. In the U.S., Vyxeos (daunorubicin and cytarabine) liposome for injection is indicated for the treatment of newly-diagnosed therapy-related acute myeloid leukemia (t-AML) or AML with myelodysplasia-related changes (AML-MRC) in adults and pediatric patients 1 year and older.3 More information about Vyxeos in the United States, including Full Prescribing Information and BOXED Warning, is available here. Important Safety Information for VYXEOS ® WARNING: VYXEOS has different dosage recommendations from other medications that contain daunorubicin and/or cytarabine. Do not substitute VYXEOS for other daunorubicin and/or cytarabine-containing products. VYXEOS should not be given to patients who have a history of serious allergic reaction to daunorubicin, cytarabine, or any of its ingredients. VYXEOS can cause a severe decrease in blood cells (red and white blood cells and cells that prevent bleeding, called platelets) which can result in serious infection or bleeding and possibly lead to death. Your doctor will monitor your blood counts during treatment with VYXEOS. Patients should tell the doctor about new onset fever or symptoms of infection or if they notice signs of bruising or bleeding. VYXEOS can cause heart-related side effects. Tell your doctor about any history of heart disease, radiation to the chest, or previous chemotherapy. Inform your doctor if you develop symptoms of heart failure such as: shortness of breath or trouble breathing swelling or fluid retention, especially in the feet, ankles, or legs unusual tiredness VYXEOS may cause allergic reactions including anaphylaxis. Seek immediate medical attention if you develop signs and symptoms of anaphylaxis such as: trouble breathing severe itching skin rash or hives swelling of the face, lips, mouth, or tongue VYXEOS contains copper and may cause copper overload in patients with Wilson's disease or other copper-processing disorders. VYXEOS can damage the skin if it leaks out of the vein. Tell your doctor right away if you experience symptoms of burning, stinging, or blisters and skin sores at the injection site. VYXEOS can harm your unborn baby. Inform your doctor if you are pregnant, planning to become pregnant, or nursing. Do not breastfeed while receiving VYXEOS. Females and males of reproductive potential should use effective contraception during treatment and for 6 months following the last dose of VYXEOS. The most common side effects are bleeding events, fever, rash, swelling, nausea, sores in the mouth or throat, diarrhea, constipation, muscle pain, tiredness, stomach pain, difficulty breathing, headache, cough, decreased appetite, irregular heartbeat, pneumonia, blood infection, chills, sleep disorders, and vomiting. Call your doctor for medical advice about side effects. You are encouraged to report negative side effects of prescription drugs to the FDA. Visit  or call 1-800-FDA-1088. You may also report side effects to Jazz Pharmaceuticals at 1-800-520-5568. About Defitelio ® (defibrotide sodium) In the U.S., Defitelio® (defibrotide sodium) injection 80mg/mL received U.S. Food and Drug Administration (FDA) marketing approval on March 30, 2016, and it is indicated for the treatment of adult and pediatric patients with hepatic veno-occlusive disease (VOD), also known as sinusoidal obstruction syndrome (SOS), with renal or pulmonary dysfunction following hematopoietic stem-cell transplantation (HSCT) and is the first and only FDA-approved therapy for patients with this rare, potentially fatal complication. Defitelio is not approved for the prevention of VOD.6 Please see full Prescribing Information for Defitelio in the United States. In Europe, defibrotide is marketed under the name Defitelio® ▼ (defibrotide). In October 2013, the European Commission granted marketing authorization to Defitelio under exceptional circumstances for the treatment of severe VOD in patients after HSCT therapy. In Europe, Defitelio is indicated in patients over one month of age. It is not indicated in patients with hypersensitivity to defibrotide or any of its excipients or with concomitant use of thrombolytic therapy. ▼This medicinal product is subject to additional monitoring. This will allow quick identification of new safety information. Healthcare professionals are asked to report any suspected adverse reactions via the national reporting system found under section 4.8 of the SmPC () The full Summary of Product Characteristics of Defitelio in Europe is available here. Important Safety Information for Defitelio Defitelio should not be given to patients who are: Currently taking anticoagulants or fibrinolytics Allergic to Defitelio or any of its ingredients Defitelio may increase the risk of bleeding in patients with VOD and should not be given to patients with active bleeding. During treatment with Defitelio, patients should be monitored for signs of bleeding. In the event that bleeding occurs during treatment with Defitelio, treatment should be temporarily or permanently stopped. Patients should tell the doctor right away about any signs or symptoms of hemorrhage such as unusual bleeding, easy bruising, blood in urine or stool, headache, confusion, slurred speech, or altered vision. Defitelio may cause allergic reactions including anaphylaxis. Patients who develop signs and symptoms of anaphylaxis such as trouble breathing, severe itching, skin rash or hives, or swelling of the face, lips, mouth or tongue should seek medical attention immediately. The most common side effects of Defitelio are decreased blood pressure, diarrhea, vomiting, nausea and nose bleeds. About Zepzelca® (lurbinectedin) Zepzelca is an alkylating drug that binds guanine residues within DNA. This triggers a cascade of events that can affect the activity of DNA binding proteins, including some transcription factors, and DNA repair pathways, resulting in disruption of the cell cycle and eventual cell death.4 The FDA approved Zepzelca under accelerated approval in June 2020 for the treatment of adult patients with metastatic SCLC with disease progression on or after platinum-based chemotherapy. The approval is based on overall response rate (ORR) and duration of response demonstrated in an open-label, monotherapy clinical study. In December 2021, Jazz and PharmaMar announced the initiation of LAGOON, a confirmatory Phase 3 clinical trial of Zepzelca for the treatment of patients with relapsed small cell lung cancer. If positive, LAGOON could confirm the benefit of Zepzelca in the treatment of small cell lung cancer (SCLC) when patients progress following 1L treatment with a platinum-based regimen and support full approval in the U.S. Zepzelca is a prescription medicine used to treat adults with SCLC that has spread to other parts of the body (metastatic) and who have received treatment with chemotherapy that contains platinum, and it did not work or is no longer working. Zepzelca is approved based on response rate and how long the response lasted. Additional studies will further evaluate the benefit of Zepzelca for this use. Important Safety Information for ZEPZELCA Before receiving ZEPZELCA, tell your healthcare provider about all of your medical conditions, including if you: have liver or kidney problems. are pregnant or plan to become pregnant. ZEPZELCA can harm your unborn baby. Females who are able to become pregnant: Your healthcare provider should do a pregnancy test before you start treatment with ZEPZELCA. You should use effective birth control (contraception) during treatment with and for 6 months after your final dose of ZEPZELCA. Tell your healthcare provider right away if you become pregnant or think that you are pregnant during treatment with ZEPZELCA. Males with female partners who are able to become pregnant should use effective birth control during treatment with and for 4 months after your final dose of ZEPZELCA. Females who are breastfeeding or plan to breastfeed. It is not known if ZEPZELCA passes into your breastmilk. Do not breastfeed during treatment with ZEPZELCA and for 2 weeks after your final dose of ZEPZELCA. Talk to your healthcare provider about the best way to feed your baby during treatment with ZEPZELCA. Tell your healthcare provider about all the medicines you take, including prescription and over-the-counter medicines, vitamins, and herbal supplements. Certain other medicines may affect how ZEPZELCA works. What should I avoid while using ZEPZELCA? Avoid eating or drinking grapefruit, or products that contain grapefruit juice during treatment with ZEPZELCA. ZEPZELCA can cause serious side effects, including: Low blood cell counts. Low blood counts including low neutrophil counts (neutropenia) and low platelet counts (thrombocytopenia) are common with ZEPZELCA, and can also be severe. Some people with low white blood cell counts may get fever, or an infection throughout the body (sepsis), that can cause death. Your healthcare provider should do blood tests before you receive each treatment with ZEPZELCA to check your blood cell counts. Tell your healthcare provider right away if you develop: fever or any other signs of infection unusual bruising or bleeding tiredness pale colored skin Liver problems. Increased liver function tests are common with ZEPZELCA, and can also be severe. Your healthcare provider should do blood tests to check your liver function before you start and during treatment with ZEPZELCA. Tell your healthcare provider right away if you develop symptoms of liver problems including: loss of appetite nausea or vomiting pain on the right side of your stomach area (abdomen) Your healthcare provider may temporarily stop treatment, lower your dose, or permanently stop ZEPZELCA if you develop low blood cell counts or liver problems during treatment with ZEPZELCA. The most common side effects of ZEPZELCA include: Tiredness low white and red blood cell counts increased kidney function blood test (creatinine) increased liver function blood tests increased blood sugar (glucose) nausea decreased appetite muscle and joint (musculoskeletal) pain low level of albumin in the blood constipation trouble breathing low levels of sodium and magnesium in the blood vomiting cough diarrhea These are not all of the possible side effects of ZEPZELCA. Call your doctor for medical advice about side effects. You are encouraged to report negative side effects of prescription drugs to the FDA. Visit or call 1-800-FDA-1088. You may also report side effects to Jazz Pharmaceuticals at 1-800-520-5568. More information about Zepzelca, including Full Prescribing Information and Patient Information, is available here. ZEPZELCA is a trademark of Pharma Mar, S.A. used by Jazz Pharmaceuticals under license. About Jazz Pharmaceuticals Jazz Pharmaceuticals plc (Nasdaq: JAZZ) is a global biopharmaceutical company whose purpose is to innovate to transform the lives of patients and their families. We are dedicated to developing life-changing medicines for people with serious diseases—often with limited or no therapeutic options. We have a diverse portfolio of marketed medicines and novel product candidates, from early- to late-stage development, in neuroscience and oncology. Within these therapeutic areas, we are identifying new options for patients by actively exploring small molecules and biologics, and through innovative delivery technologies and cannabinoid science. Jazz is headquartered in Dublin, Ireland and has employees around the globe, serving patients in nearly 75 countries. Please visit for more information. Caution Concerning Forward-Looking Statements This press release contains forward-looking statements, including, but not limited to, statements related to improving standards of care in blood cancer and other hematologic diseases and other statements that are not historical facts. These forward-looking statements are based on Jazz Pharmaceuticals' current plans, objectives, estimates, expectations and intentions and inherently involve significant risks and uncertainties. Actual results and the timing of events could differ materially from those anticipated in such forward-looking statements as a result of these risks and uncertainties, which include, without limitation, risks and uncertainties associated with pharmaceutical product development, and other risks and uncertainties affecting Jazz Pharmaceuticals and its development programs, including those described from time to time under the caption "Risk Factors" and elsewhere in Jazz Pharmaceuticals plc's Securities and Exchange Commission filings and reports (Commission File No. 001-33500), including Jazz Pharmaceuticals' Annual Report on Form 10-K for the year ended December 31, 2022, as supplemented by our Quarterly Report on Form 10-Q for the quarter ended June 30, 2023, and future filings and reports by Jazz Pharmaceuticals. Other risks and uncertainties of which Jazz Pharmaceuticals is not currently aware may also affect Jazz Pharmaceuticals' forward-looking statements and may cause actual results and the timing of events to differ materially from those anticipated. The forward-looking statements herein are made only as of the date hereof or as of the dates indicated in the forward-looking statements, even if they are subsequently made available by Jazz Pharmaceuticals on its website or otherwise. Jazz Pharmaceuticals undertakes no obligation to update or supplement any forward-looking statements to reflect actual results, new information, future events, changes in its expectations or other circumstances that exist after the date as of which the forward-looking statements were made. Contacts: Jazz Media Contact: Kristin Bhavnani Head of Strategic Brand Engagement Jazz Pharmaceuticals plc [email protected] Ireland +353 1 637 2141 U.S. +1 215 867 4948 Jazz Investor Contact: Andrea N. Flynn, Ph.D. Vice President, Head, Investor Relations Jazz Pharmaceuticals plc [email protected] Ireland +353 1 634 3211 U.S. +1 650 496 2717 References 1 Maese L, et al. Efficacy and Safety of Intramuscular (IM) Recombinant Erwinia Asparaginase in Acute Lymphoblastic Leukemia (ALL) or Lymphoblastic Lymphoma (LBL): The Children's Oncology Group (COG) AALL1931 study. American Society of Hematology. 2023. Available at 2 Rylaze (asparaginase erwinia chrysanthemi (recombinant)-rywn) Prescribing Information. Palo Alto, CA: Jazz Pharmaceuticals, Inc. 3 Vyxeos (daunorubicin and cytarabine) Prescribing Information. Palo Alto, CA: Jazz Pharmaceuticals, Inc. 4 ZEPZELCA (lurbinectedin) Prescribing Information. Palo Alto, CA: Jazz Pharmaceuticals, Inc. SOURCE Jazz Pharmaceuticals plc

Data from multiple studies of investigational bispecific drug zanidatamab, including pivotal Phase 2 biliary tract cancers (BTC) trial results, demonstrate breakthrough HER2-targeted pan-tumor potential Nine abstracts accepted for presentation, including two oral presentations, reinforce Jazz's growing leadership in oncology and commitment to patients through clinically beneficial treatments and novel research Company to host investor webcast on June 2, 2023, to review zanidatamab BTC data presentation DUBLIN, April 27, 2023 /PRNewswire/ -- Jazz Pharmaceuticals plc (Nasdaq: JAZZ) today announced that the company, along with its partners, will present nine abstracts at the American Society of Clinical Oncology (ASCO) Annual Meeting from June 2-6, 2023. Presentations include clinical data from trials of zanidatamab, Zepzelca® (lurbinectedin) and Vyxeos® (daunorubicin and cytarabine). "We are thrilled to present, together with our partner Zymeworks, an oral presentation of pivotal trial results in patients with HER2-positive BTC, an aggressive disease that currently has no FDA-approved HER2-directed treatment options," said Rob Iannone, M.D., M.S.C.E., executive vice president, global head of research and development of Jazz Pharmaceuticals. "The breadth of oncology data being presented by Jazz and our partners reflects our relentless focus on raising the standard of care for some of the most difficult-to-treat cancers." Pivotal data from the Phase 2b study of the bispecific antibody zanidatamab in previously treated HER2-amplified BTC was selected by ASCO as an oral presentation. In addition, updated results from a Phase 1b/2 study of zanidatamab in combination with docetaxel as a first-line therapy for patients with advanced HER2-positive breast cancer will be presented by the trial sponsor, BeiGene. Other presentations at the annual meeting feature data from our oncology pipeline and current product portfolio, across a range of solid tumors and hematological malignancies, include: An oral presentation from a Jazz-supported Investigator Sponsored Trial (IST) featuring results from a Phase 1b study evaluating the efficacy of lurbinectedin in combination with doxorubicin in soft-tissue sarcoma (STS), which is intended to serve as a lead-in to a randomized Phase 2 trial in leiomyosarcoma (LMS) A poster presentation of a post-hoc analysis using Phase 3 trial data to investigate the impact of Vyxeos versus 7+3 on cardiac impairment in older adults with newly diagnosed high-risk or secondary acute myeloid leukemia (AML) The full ASCO abstracts will be available on May 25, 2023, after 5 p.m. ET. The abstract titles are available at: The full list of Jazz or partner-supported presentations at the 2023 ASCO Annual Meeting are: Zanidatamab Presentations Zepzelca Presentations Vyxeos (JZP351/CPX315) Presentations Webcast Information The Company will host a webcast on Friday, June 2, 2023, at 6:45 p.m. CT / 7:45 p.m. ET / 12:45 a.m. IST (June 3) to provide a review of the zanidatamab BTC data presented at the 2023 ASCO Annual Meeting. Jazz senior management will discuss development and commercialization of zanidatamab, and Dr. Shubham Pant, M.D., MBBS, who is presenting the zanidatamab BTC findings at ASCO, will provide an overview of the data. Dr. Pant is a Professor in the Department of Gastrointestinal Medical Oncology with a joint appointment in the Department of Investigational Cancer Therapeutics at The University of Texas MD Anderson Cancer Center. Interested parties may register for the call in advance here or via the Investors section of the Jazz Pharmaceuticals website at . To ensure a timely connection, it is recommended that participants register at least 15 minutes prior to the scheduled webcast. A replay of the webcast will be available via the Investors section of the Jazz Pharmaceuticals website at . About Zanidatamab Zanidatamab is an investigational bispecific antibody, based on Zymeworks' Azymetric™ platform, that can simultaneously bind two non-overlapping epitopes of HER2, known as biparatopic binding. This unique design results in multiple mechanisms of action including dual HER2 signal blockade, increased binding and removal of HER2 protein from the cell surface, and potent effector function leading to encouraging antitumor activity in patients. Zymeworks, along with collaborators Jazz and BeiGene, Ltd. (BeiGene), are developing zanidatamab in multiple clinical trials as a targeted treatment option for patients with solid tumors that express HER2. The U.S. Food and Drug Administration (FDA) has granted Breakthrough Therapy designation for zanidatamab in patients with previously treated HER2 gene-amplified biliary tract cancers (BTC), and two Fast Track designations for zanidatamab: one as a single agent for refractory BTC and one in combination with standard of care chemotherapy for first-line gastroesophageal adenocarcinoma (GEA). Additionally, zanidatamab has received Orphan Drug designations from FDA for the treatment of BTC and GEA, as well as Orphan Drug designation from the European Medicines Agency for the treatment of gastric cancer. Zanidatamab was also granted Breakthrough Therapy designation from the Center for Drug Evaluation (CDE) in China. About Zepzelca® (lurbinectedin) Zepzelca is an alkylating drug that binds guanine residues within DNA. This triggers a cascade of events that can affect the activity of DNA binding proteins, including some transcription factors, and DNA repair pathways, resulting in disruption of the cell cycle and eventual cell death.1 The FDA approved Zepzelca under accelerated approval in June 2020 for the treatment of adult patients with metastatic SCLC with disease progression on or after platinum-based chemotherapy. The approval is based on overall response rate (ORR) and duration of response demonstrated in an open-label, monotherapy clinical study. In December 2021, Jazz and PharmaMar announced the initiation of LAGOON, a confirmatory Phase 3 clinical trial of Zepzelca for the treatment of patients with relapsed small cell lung cancer. If positive, LAGOON could confirm the benefit of Zepzelca in the treatment of small cell lung cancer (SCLC) when patients progress following 1L treatment with a platinum-based regimen and support full approval in the U.S. Zepzelca is a prescription medicine used to treat adults with SCLC that has spread to other parts of the body (metastatic) and who have received treatment with chemotherapy that contains platinum, and it did not work or is no longer working. Zepzelca is approved based on response rate and how long the response lasted. Additional studies will further evaluate the benefit of Zepzelca for this use. Important Safety Information for ZEPZELCA Before receiving ZEPZELCA, tell your healthcare provider about all of your medical conditions, including if you: have liver or kidney problems. are pregnant or plan to become pregnant. ZEPZELCA can harm your unborn baby. Females who are able to become pregnant: Your healthcare provider should do a pregnancy test before you start treatment with ZEPZELCA. You should use effective birth control (contraception) during treatment with and for 6 months after your final dose of ZEPZELCA. Tell your healthcare provider right away if you become pregnant or think that you are pregnant during treatment with ZEPZELCA. Males with female partners who are able to become pregnant should use effective birth control during treatment with and for 4 months after your final dose of ZEPZELCA. Females who are breastfeeding or plan to breastfeed. It is not known if ZEPZELCA passes into your breastmilk. Do not breastfeed during treatment with ZEPZELCA and for 2 weeks after your final dose of ZEPZELCA. Talk to your healthcare provider about the best way to feed your baby during treatment with ZEPZELCA. Tell your healthcare provider about all the medicines you take, including prescription and over-the-counter medicines, vitamins, and herbal supplements. Certain other medicines may affect how ZEPZELCA works. What should I avoid while using ZEPZELCA? Avoid eating or drinking grapefruit, or products that contain grapefruit juice during treatment with ZEPZELCA. ZEPZELCA can cause serious side effects, including: Low blood cell counts. Low blood counts including low neutrophil counts (neutropenia) and low platelet counts (thrombocytopenia) are common with ZEPZELCA, and can also be severe. Some people with low white blood cell counts may get fever, or an infection throughout the body (sepsis), that can cause death. Your healthcare provider should do blood tests before you receive each treatment with ZEPZELCA to check your blood cell counts. Tell your healthcare provider right away if you develop: fever or any other signs of infection unusual bruising or bleeding tiredness pale colored skin Liver problems. Increased liver function tests are common with ZEPZELCA, and can also be severe. Your healthcare provider should do blood tests to check your liver function before you start and during treatment with ZEPZELCA. Tell your healthcare provider right away if you develop symptoms of liver problems including: loss of appetite nausea or vomiting pain on the right side of your stomach area (abdomen) Your healthcare provider may temporarily stop treatment, lower your dose, or permanently stop ZEPZELCA if you develop low blood cell counts or liver problems during treatment with ZEPZELCA. The most common side effects of ZEPZELCA include: Tiredness low white and red blood cell counts increased kidney function blood test (creatinine) increased liver function blood tests increased blood sugar (glucose) nausea decreased appetite muscle and joint (musculoskeletal) pain low level of albumin in the blood constipation trouble breathing low levels of sodium and magnesium in the blood vomiting cough diarrhea These are not all of the possible side effects of ZEPZELCA. Call your doctor for medical advice about side effects. You are encouraged to report negative side effects of prescription drugs to the FDA. Visit or call 1-800-FDA-1088. You may also report side effects to Jazz Pharmaceuticals at 1-800-520-5568. More information about Zepzelca, including Full Prescribing Information and Patient Information, is available here. ZEPZELCA is a trademark of Pharma Mar, S.A. used by Jazz Pharmaceuticals under license. About Vyxeos® (daunorubicin and cytarabine) liposome for injection Vyxeos is a liposomal combination of daunorubicin, an anthracycline topoisomerase inhibitor, and cytarabine, a nucleoside metabolic inhibitor. In the U.S., Vyxeos (daunorubicin and cytarabine) liposome for injection is indicated for the treatment of newly-diagnosed therapy-related acute myeloid leukemia (t-AML) or AML with myelodysplasia-related changes (AML-MRC) in adults and pediatric patients 1 year and older.2 More information about Vyxeos in the United States, including Full Prescribing Information, BOXED Warning and Medication Guide, is available here. Important Safety Information for VYXEOS ® WARNING: VYXEOS has different dosage recommendations from other medications that contain daunorubicin and/or cytarabine. Do not substitute VYXEOS for other daunorubicin and/or cytarabine-containing products. VYXEOS should not be given to patients who have a history of serious allergic reaction to daunorubicin, cytarabine, or any of its ingredients. VYXEOS can cause a severe decrease in blood cells (red and white blood cells and cells that prevent bleeding, called platelets) which can result in serious infection or bleeding and possibly lead to death. Your doctor will monitor your blood counts during treatment with VYXEOS. Patients should tell the doctor about new onset fever or symptoms of infection or if they notice signs of bruising or bleeding. VYXEOS can cause heart-related side effects. Tell your doctor about any history of heart disease, radiation to the chest, or previous chemotherapy. Inform your doctor if you develop symptoms of heart failure such as: shortness of breath or trouble breathing swelling or fluid retention, especially in the feet, ankles, or legs unusual tiredness VYXEOS may cause allergic reactions including anaphylaxis. Seek immediate medical attention if you develop signs and symptoms of anaphylaxis such as: trouble breathing severe itching skin rash or hives swelling of the face, lips, mouth, or tongue VYXEOS contains copper and may cause copper overload in patients with Wilson's disease or other copper-processing disorders. VYXEOS can damage the skin if it leaks out of the vein. Tell your doctor right away if you experience symptoms of burning, stinging, or blisters and skin sores at the injection site. VYXEOS can harm your unborn baby. Inform your doctor if you are pregnant, planning to become pregnant, or nursing. Do not breastfeed while receiving VYXEOS. Females and males of reproductive potential should use effective contraception during treatment and for 6 months following the last dose of VYXEOS. The most common side effects are bleeding events, fever, rash, swelling, nausea, sores in the mouth or throat, diarrhea, constipation, muscle pain, tiredness, stomach pain, difficulty breathing, headache, cough, decreased appetite, irregular heartbeat, pneumonia, blood infection, chills, sleep disorders, and vomiting. Call your doctor for medical advice about side effects. You are encouraged to report negative side effects of prescription drugs to the FDA. Visit or call 1-800-FDA-1088. You may also report side effects to Jazz Pharmaceuticals at 1-800-520-5568. About Jazz Pharmaceuticals plc Jazz Pharmaceuticals plc (Nasdaq: JAZZ) is a global biopharmaceutical company whose purpose is to innovate to transform the lives of patients and their families. We are dedicated to developing life-changing medicines for people with serious diseases—often with limited or no therapeutic options. We have a diverse portfolio of marketed medicines and novel product candidates, from early- to late-stage development, in neuroscience and oncology. Within these therapeutic areas, we are identifying new options for patients by actively exploring small molecules and biologics, and through innovative delivery technologies and cannabinoid science. Jazz is headquartered in Dublin, Ireland and has employees around the globe, serving patients in nearly 75 countries. Please visit for more information. Caution Concerning Forward-Looking Statements This press release contains forward-looking statements, including, but not limited to, statements related raising the standard of care for some of the most difficult-to-treat cancer types and other statements that are not historical facts. These forward-looking statements are based on Jazz Pharmaceuticals' current plans, objectives, estimates, expectations and intentions and inherently involve significant risks and uncertainties. Actual results and the timing of events could differ materially from those anticipated in such forward-looking statements as a result of these risks and uncertainties, which include, without limitation, risks and uncertainties associated with pharmaceutical product development, and other risks and uncertainties affecting Jazz Pharmaceuticals and its development programs, including those described from time to time under the caption "Risk Factors" and elsewhere in Jazz Pharmaceuticals plc's Securities and Exchange Commission filings and reports (Commission File No. 001-33500), including Jazz Pharmaceuticals' Annual Report on Form 10-K for the year ended December 31, 2022 and future filings and reports by Jazz Pharmaceuticals. Other risks and uncertainties of which Jazz Pharmaceuticals is not currently aware may also affect Jazz Pharmaceuticals' forward-looking statements and may cause actual results and the timing of events to differ materially from those anticipated. The forward-looking statements herein are made only as of the date hereof or as of the dates indicated in the forward-looking statements, even if they are subsequently made available by Jazz Pharmaceuticals on its website or otherwise. Jazz Pharmaceuticals undertakes no obligation to update or supplement any forward-looking statements to reflect actual results, new information, future events, changes in its expectations or other circumstances that exist after the date as of which the forward-looking statements were made. Contacts: Jazz Media Contact: Kristin Bhavnani Head of Global Corporate Communications Jazz Pharmaceuticals plc [email protected] Ireland +353 1 637 2141 U.S. +1 215 867 4948 Jazz Investor Contact: Andrea N. Flynn, Ph.D. Vice President, Head, Investor Relations Jazz Pharmaceuticals plc [email protected] Ireland +353 1 634 3211 U.S. +1 650 496 2717 References: 1 ZEPZELCA (lurbinectedin) Prescribing Information. Palo Alto, CA: Jazz Pharmaceuticals, Inc. 2 Vyxeos (daunorubicin and cytarabine) Prescribing Information. Palo Alto, CA: Jazz Pharmaceuticals, Inc. SOURCE Jazz Pharmaceuticals plc

Data from multiple studies of investigational bispecific drug zanidatamab, including pivotal Phase 2 biliary tract cancers (BTC) trial results, demonstrate breakthrough HER2-targeted pan-tumor potential Nine abstracts accepted for presentation, including two oral presentations, reinforce Jazz's growing leadership in oncology and commitment to patients through clinically beneficial treatments and novel research Company to host investor webcast on June 2, 2023, to review zanidatamab BTC data presentation DUBLIN, April 27, 2023 /PRNewswire/ --Jazz Pharmaceuticals, Inc. (Nasdaq: JAZZ) today announced that the company, along with its partners, will present nine abstracts at the American Society of Clinical Oncology (ASCO) Annual Meeting from June 2-6, 2023. Presentations include clinical data from trials of zanidatamab, Zepzelca® (lurbinectedin) and Vyxeos® (daunorubicin and cytarabine). "We are thrilled to present, together with our partner Zymeworks, an oral presentation of pivotal trial results in patients with HER2-positive BTC, an aggressive disease that currently has no FDA-approved HER2-directed treatment options," said Rob Iannone, M.D., M.S.C.E., executive vice president, global head of research and development of Jazz Pharmaceuticals. "The breadth of oncology data being presented by Jazz and our partners reflects our relentless focus on raising the standard of care for some of the most difficult-to-treat cancers." Pivotal data from the Phase 2b study of the bispecific antibody zanidatamab in previously treated HER2-amplified BTC was selected by ASCO as an oral presentation. In addition, updated results from a Phase 1b/2 study of zanidatamab in combination with docetaxel as a first-line therapy for patients with advanced HER2-positive breast cancer will be presented by the trial sponsor, BeiGene. Other presentations at the annual meeting feature data from our oncology pipeline and current product portfolio, across a range of solid tumors and hematological malignancies, include: An oral presentation from a Jazz-supported Investigator Sponsored Trial (IST) featuring results from a Phase 1b study evaluating the efficacy of lurbinectedin in combination with doxorubicin in soft-tissue sarcoma (STS), which is intended to serve as a lead-in to a randomized Phase 2 trial in leiomyosarcoma (LMS) A poster presentation of a post-hoc analysis using Phase 3 trial data to investigate the impact of Vyxeos versus 7+3 on cardiac impairment in older adults with newly diagnosed high-risk or secondary acute myeloid leukemia (AML) The full ASCO abstracts will be available on May 25, 2023, after 5 p.m. ET. The abstract titles are available at: The full list of Jazz or partner-supported presentations at the 2023 ASCO Annual Meeting are: Zanidatamab Presentations Zepzelca Presentations Vyxeos (JZP351/CPX315) Presentations Webcast Information The Company will host a webcast on Friday, June 2, 2023, at 6:45 p.m. CT / 7:45 p.m. ET / 12:45 a.m. IST (June 3) to provide a review of the zanidatamab BTC data presented at the 2023 ASCO Annual Meeting. Jazz senior management will discuss development and commercialization of zanidatamab, and Dr. Shubham Pant, M.D., MBBS, who is presenting the zanidatamab BTC findings at ASCO, will provide an overview of the data. Dr. Pant is a Professor in the Department of Gastrointestinal Medical Oncology with a joint appointment in the Department of Investigational Cancer Therapeutics at The University of Texas MD Anderson Cancer Center. Interested parties may register for the call in advance here or via the Investors section of the Jazz Pharmaceuticals website at . To ensure a timely connection, it is recommended that participants register at least 15 minutes prior to the scheduled webcast. A replay of the webcast will be available via the Investors section of the Jazz Pharmaceuticals website at . About Zanidatamab Zanidatamab is an investigational bispecific antibody, based on Zymeworks' Azymetric™ platform, that can simultaneously bind two non-overlapping epitopes of HER2, known as biparatopic binding. This unique design results in multiple mechanisms of action including dual HER2 signal blockade, increased binding and removal of HER2 protein from the cell surface, and potent effector function leading to encouraging antitumor activity in patients. Zymeworks, along with collaborators Jazz and BeiGene, Ltd. (BeiGene), are developing zanidatamab in multiple clinical trials as a targeted treatment option for patients with solid tumors that express HER2. The U.S. Food and Drug Administration (FDA) has granted Breakthrough Therapy designation for zanidatamab in patients with previously treated HER2 gene-amplified biliary tract cancers (BTC), and two Fast Track designations for zanidatamab: one as a single agent for refractory BTC and one in combination with standard of care chemotherapy for first-line gastroesophageal adenocarcinoma (GEA). Additionally, zanidatamab has received Orphan Drug designations from FDA for the treatment of BTC and GEA, as well as Orphan Drug designation from the European Medicines Agency for the treatment of gastric cancer. Zanidatamab was also granted Breakthrough Therapy designation from the Center for Drug Evaluation (CDE) in China. About Zepzelca® (lurbinectedin) Zepzelca is an alkylating drug that binds guanine residues within DNA. This triggers a cascade of events that can affect the activity of DNA binding proteins, including some transcription factors, and DNA repair pathways, resulting in disruption of the cell cycle and eventual cell death.1 The FDA approved Zepzelca under accelerated approval in June 2020 for the treatment of adult patients with metastatic SCLC with disease progression on or after platinum-based chemotherapy. The approval is based on overall response rate (ORR) and duration of response demonstrated in an open-label, monotherapy clinical study. In December 2021, Jazz and PharmaMar announced the initiation of LAGOON, a confirmatory Phase 3 clinical trial of Zepzelca for the treatment of patients with relapsed small cell lung cancer. If positive, LAGOON could confirm the benefit of Zepzelca in the treatment of small cell lung cancer (SCLC) when patients progress following 1L treatment with a platinum-based regimen and support full approval in the U.S. Zepzelca is a prescription medicine used to treat adults with SCLC that has spread to other parts of the body (metastatic) and who have received treatment with chemotherapy that contains platinum, and it did not work or is no longer working. Zepzelca is approved based on response rate and how long the response lasted. Additional studies will further evaluate the benefit of Zepzelca for this use. Important Safety Information for ZEPZELCA Before receiving ZEPZELCA, tell your healthcare provider about all of your medical conditions, including if you: have liver or kidney problems. are pregnant or plan to become pregnant. ZEPZELCA can harm your unborn baby. Females who are able to become pregnant: Your healthcare provider should do a pregnancy test before you start treatment with ZEPZELCA. You should use effective birth control (contraception) during treatment with and for 6 months after your final dose of ZEPZELCA. Tell your healthcare provider right away if you become pregnant or think that you are pregnant during treatment with ZEPZELCA. Males with female partners who are able to become pregnant should use effective birth control during treatment with and for 4 months after your final dose of ZEPZELCA. Females who are breastfeeding or plan to breastfeed. It is not known if ZEPZELCA passes into your breastmilk. Do not breastfeed during treatment with ZEPZELCA and for 2 weeks after your final dose of ZEPZELCA. Talk to your healthcare provider about the best way to feed your baby during treatment with ZEPZELCA. Tell your healthcare provider about all the medicines you take, including prescription and over-the-counter medicines, vitamins, and herbal supplements. Certain other medicines may affect how ZEPZELCA works. What should I avoid while using ZEPZELCA? Avoid eating or drinking grapefruit, or products that contain grapefruit juice during treatment with ZEPZELCA. ZEPZELCA can cause serious side effects, including: Low blood cell counts. Low blood counts including low neutrophil counts (neutropenia) and low platelet counts (thrombocytopenia) are common with ZEPZELCA, and can also be severe. Some people with low white blood cell counts may get fever, or an infection throughout the body (sepsis), that can cause death. Your healthcare provider should do blood tests before you receive each treatment with ZEPZELCA to check your blood cell counts. Tell your healthcare provider right away if you develop: fever or any other signs of infection unusual bruising or bleeding tiredness pale colored skin Liver problems. Increased liver function tests are common with ZEPZELCA, and can also be severe. Your healthcare provider should do blood tests to check your liver function before you start and during treatment with ZEPZELCA. Tell your healthcare provider right away if you develop symptoms of liver problems including: loss of appetite nausea or vomiting pain on the right side of your stomach area (abdomen) Your healthcare provider may temporarily stop treatment, lower your dose, or permanently stop ZEPZELCA if you develop low blood cell counts or liver problems during treatment with ZEPZELCA. The most common side effects of ZEPZELCA include: Tiredness low white and red blood cell counts increased kidney function blood test (creatinine) increased liver function blood tests increased blood sugar (glucose) nausea decreased appetite muscle and joint (musculoskeletal) pain low level of albumin in the blood constipation trouble breathing low levels of sodium and magnesium in the blood vomiting cough diarrhea These are not all of the possible side effects of ZEPZELCA. Call your doctor for medical advice about side effects. You are encouraged to report negative side effects of prescription drugs to the FDA. Visit or call 1-800-FDA-1088. You may also report side effects to Jazz Pharmaceuticals at 1-800-520-5568. More information about Zepzelca, including Full Prescribing Information and Patient Information, is available here. ZEPZELCA is a trademark of Pharma Mar, S.A. used by Jazz Pharmaceuticals under license. About Vyxeos® (daunorubicin and cytarabine) liposome for injection Vyxeos is a liposomal combination of daunorubicin, an anthracycline topoisomerase inhibitor, and cytarabine, a nucleoside metabolic inhibitor. In the U.S., Vyxeos (daunorubicin and cytarabine) liposome for injection is indicated for the treatment of newly-diagnosed therapy-related acute myeloid leukemia (t-AML) or AML with myelodysplasia-related changes (AML-MRC) in adults and pediatric patients 1 year and older.2 More information about Vyxeos in the United States, including Full Prescribing Information, BOXED Warning and Medication Guide, is available here. Important Safety Information for VYXEOS® WARNING: VYXEOS has different dosage recommendations from other medications that contain daunorubicin and/or cytarabine. Do not substitute VYXEOS for other daunorubicin and/or cytarabine-containing products. VYXEOS should not be given to patients who have a history of serious allergic reaction to daunorubicin, cytarabine, or any of its ingredients. VYXEOS can cause a severe decrease in blood cells (red and white blood cells and cells that prevent bleeding, called platelets) which can result in serious infection or bleeding and possibly lead to death. Your doctor will monitor your blood counts during treatment with VYXEOS. Patients should tell the doctor about new onset fever or symptoms of infection or if they notice signs of bruising or bleeding. VYXEOS can cause heart-related side effects. Tell your doctor about any history of heart disease, radiation to the chest, or previous chemotherapy. Inform your doctor if you develop symptoms of heart failure such as: shortness of breath or trouble breathing swelling or fluid retention, especially in the feet, ankles, or legs unusual tiredness VYXEOS may cause allergic reactions including anaphylaxis. Seek immediate medical attention if you develop signs and symptoms of anaphylaxis such as: trouble breathing severe itching skin rash or hives swelling of the face, lips, mouth, or tongue VYXEOS contains copper and may cause copper overload in patients with Wilson's disease or other copper-processing disorders. VYXEOS can damage the skin if it leaks out of the vein. Tell your doctor right away if you experience symptoms of burning, stinging, or blisters and skin sores at the injection site. VYXEOS can harm your unborn baby. Inform your doctor if you are pregnant, planning to become pregnant, or nursing. Do not breastfeed while receiving VYXEOS. Females and males of reproductive potential should use effective contraception during treatment and for 6 months following the last dose of VYXEOS. The most common side effects are bleeding events, fever, rash, swelling, nausea, sores in the mouth or throat, diarrhea, constipation, muscle pain, tiredness, stomach pain, difficulty breathing, headache, cough, decreased appetite, irregular heartbeat, pneumonia, blood infection, chills, sleep disorders, and vomiting. Call your doctor for medical advice about side effects. You are encouraged to report negative side effects of prescription drugs to the FDA. Visit or call 1-800-FDA-1088. You may also report side effects to Jazz Pharmaceuticals at 1-800-520-5568. About Jazz Pharmaceuticals plc Jazz Pharmaceuticals plc (Nasdaq: JAZZ) is a global biopharmaceutical company whose purpose is to innovate to transform the lives of patients and their families. We are dedicated to developing life-changing medicines for people with serious diseases—often with limited or no therapeutic options. We have a diverse portfolio of marketed medicines and novel product candidates, from early- to late-stage development, in neuroscience and oncology. Within these therapeutic areas, we are identifying new options for patients by actively exploring small molecules and biologics, and through innovative delivery technologies and cannabinoid science. Jazz is headquartered in Dublin, Ireland and has employees around the globe, serving patients in nearly 75 countries. Please visit for more information. Caution Concerning Forward-Looking Statements This press release contains forward-looking statements, including, but not limited to, statements related raising the standard of care for some of the most difficult-to-treat cancer types and other statements that are not historical facts. These forward-looking statements are based on Jazz Pharmaceuticals' current plans, objectives, estimates, expectations and intentions and inherently involve significant risks and uncertainties. Actual results and the timing of events could differ materially from those anticipated in such forward-looking statements as a result of these risks and uncertainties, which include, without limitation, risks and uncertainties associated with pharmaceutical product development, and other risks and uncertainties affecting Jazz Pharmaceuticals and its development programs, including those described from time to time under the caption "Risk Factors" and elsewhere in Jazz Pharmaceuticals plc's Securities and Exchange Commission filings and reports (Commission File No. 001-33500), including Jazz Pharmaceuticals' Annual Report on Form 10-K for the year ended December 31, 2022 and future filings and reports by Jazz Pharmaceuticals. Other risks and uncertainties of which Jazz Pharmaceuticals is not currently aware may also affect Jazz Pharmaceuticals' forward-looking statements and may cause actual results and the timing of events to differ materially from those anticipated. The forward-looking statements herein are made only as of the date hereof or as of the dates indicated in the forward-looking statements, even if they are subsequently made available by Jazz Pharmaceuticals on its website or otherwise. Jazz Pharmaceuticals undertakes no obligation to update or supplement any forward-looking statements to reflect actual results, new information, future events, changes in its expectations or other circumstances that exist after the date as of which the forward-looking statements were made. Contacts: Jazz Media Contact: Kristin Bhavnani Head of Global Corporate Communications Jazz Pharmaceuticals plc CorporateAffairsMediaInfo@jazzpharma.com Ireland +353 1 637 2141 U.S. +1 215 867 4948 Jazz Investor Contact: Andrea N. Flynn, Ph.D. Vice President, Head, Investor Relations Jazz Pharmaceuticals plc investorinfo@jazzpharma.com Ireland +353 1 634 3211 U.S. +1 650 496 2717 References: 1 ZEPZELCA (lurbinectedin) Prescribing Information. Palo Alto, CA: Jazz Pharmaceuticals, Inc. 2 Vyxeos (daunorubicin and cytarabine) Prescribing Information. Palo Alto, CA: Jazz Pharmaceuticals, Inc. Company Codes: NASDAQ-NMS:JAZZ