The U.S. NCCN Guidelines Included Ropeginterferon alfa-2b-njft (P1101) as a Recommended Treatment Option for Patients with Essential Thrombocythemia (ET)

The U.S. National Comprehensive Cancer Network Clinical Practice Guidelines in Oncology ( NCCN Guidelines ) has been updated to include ropeginterferon alfa-2b-njft (P1101) as a recommended treatment option for patients with essential thrombocythemia (ET), listing it as a Category 1 preferred regimen for high-risk patients with ET who have an inadequate response to or loss of response to existing treatments. About NCCN The NCCN is a highly renowned and respected not-for-profit alliance of leading cancer centers in the United States. Its treatment practice guidelines are widely respected and followed by the US physician community, and serve to inform and facilitate coverage decisions with payers for oncology therapies. About PharmaEssentia PharmaEssentia Corporation, headquartered in Taipei, Taiwan, is a global and rapidly growing biopharmaceutical innovator. Leveraging deep expertise and proven scientific principles, PharmaEssentia aims to deliver effective new biologics for challenging diseases in the areas of hematology, oncology, and immunology with one approved product and a diversifying pipeline. Founded in 2003 by a team of Taiwanese-American executives and renowned scientists from U.S. biotechnology and pharmaceutical companies, today PharmaEssentia is expanding its global presence with operations in the U.S., Japan, China, and Korea, along with a world-class biologics production facility in Taichung, Taiwan. For more information about PharmaEssentia, visit the website or LinkedIn About Essential Thrombocythemia (ET) Essential thrombocythemia is a rare blood disorder and type of myeloproliferative neoplasm (MPN). It is characterized by the bone marrow overproducing platelets. Patients with ET are at an increased risk of blood clots, abnormal bleeding and enlarged spleens. ET is often caused by genetic mutations such as a JAK2 genetic mutation. About BESREMi® (ropeginterferon alfa-2b-njft) Ropeginterferon alfa-2b-njft is currently FDA-approved and marketed as BESREMi® for the treatment of adults with polycythemia vera (PV). The Company plans to seek a ropeginterferon alfa-2b-njft label expansion to include ET and has submitted a sBLA with the U.S. FDA. BESREMi® holds orphan drug designation in the United States for the treatment of polycythemia vera (PV) in adults. It has received regulatory approval in over 40 countries, including from the European Medicines Agency (2019), the U.S. Food and Drug Administration (2021), and the Pharmaceuticals and Medical Devices Agency in Japan (2023). The product was developed by PharmaEssentia. PharmaEssentia retains full global intellectual property rights across all indications. INDICATION BESREMi® is indicated for the treatment of adults with polycythemia vera. IMPORTANT SAFETY INFORMATION WARNING: RISK OF SERIOUS DISORDERS Interferon alfa products may cause or aggravate fatal or life-threatening neuropsychiatric, autoimmune, ischemic, and infectious disorders. Patients should be monitored closely with periodic clinical and laboratory evaluations. Therapy should be withdrawn in patients with persistently severe or worsening signs or symptoms of these conditions. In many, but not all cases, these disorders resolve after stopping therapy. CONTRAINDICATIONS Existence of or history of severe depression, suicidal ideation, or suicide attempt Hypersensitivity to interferons or any inactive ingredients Moderate or severe hepatic impairment History or presence of active serious or untreated autoimmune disease History of transplantation and receiving immunosuppressant agents WARNINGS AND PRECAUTIONS Patients exhibiting the following events should be closely monitored and may require dose reduction or discontinuation of therapy: Depression and Suicide: Monitor closely for symptoms and need for treatment. Endocrine Toxicity: Discontinue if endocrine disorders occur that cannot be medically managed. Cardiovascular Toxicity: Avoid use in patients with severe, acute or unstable cardiovascular disease. Monitor patients with history of cardiovascular disorders more frequently. Decreased Peripheral Blood Counts: Perform blood counts at baseline, every 2 weeks during titration, and at least every 3-6 months during maintenance treatment. Hypersensitivity Reactions: Stop treatment and immediately manage reaction. Pancreatitis: Consider discontinuation if confirmed pancreatitis Colitis: Discontinue if signs or symptoms of colitis Pulmonary Toxicity: Discontinue if pulmonary infiltrates or pulmonary function impairment Ophthalmologic Toxicity: Advise patients to have eye examinations before and during treatment. Evaluate eye symptoms promptly and discontinue if new or worsening eye disorders. Hyperlipidemia: Monitor serum triglycerides before BESREMi® treatment and intermittently during therapy and manage when elevated. Hepatotoxicity: Monitor liver enzymes and hepatic function at baseline and during treatment. Reduce dose or discontinue depending on severity. Renal Toxicity: Monitor serum creatinine at baseline and during therapy. Discontinue if severe renal impairment develops. Dental and Periodontal Toxicity: Advise patients on good oral hygiene and to have regular dental examinations. Dermatologic Toxicity: Consider discontinuing if clinically significant dermatologic toxicity. Driving and Operating Machinery: Advise patients to avoid driving or using machinery if they experience dizziness, somnolence, or hallucination. Please see full Prescribing Information , including Boxed Warning. Contacts Media Contact Muriel Huang Director, Investor Relations and Corporate Communication [email protected] Previous Next Healthcare Professionals Patients News Investors Careers PharmaEssentia Medical Affairs ESG Products Technology Pipeline Clinical Trials Contact & Locations © 2026 PharmaEssentia Corporation. Privacy Notice Terms of Use BESREMi, the BESREMi logo, and PharmaEssentia are registered trademarks of PharmaEssentia Corporation. The PharmaEssentia logo is a trademark of PharmaEssentia Corporation. 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