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FDA Approves New Monday-Wednesday-Friday Dosing Schedule for Rylaze
Dec 2022: A new Monday-Wednesday-Friday dosing schedule for asparaginase erwinia chrysanthemi (recombinant)-rywn has been approved by the Food and Drug Administration (Rylaze, Jazz Pharmaceuticals). Patients should receive 25 mg/m2 intramuscularly on Monday and Wednesday in the morning and 50 mg/m2 intramuscularly on Friday in the afternoon under the modified protocol. Additionally, it is permitted to be injected intramuscularly at a dose of 25 mg/m2 every 48 hours.
In June 2021, the FDA authorised Rylaze as a part of a multi-agent chemotherapy regimen for adult and paediatric patients with acute lymphoblastic leukaemia (ALL) and lymphoblastic lymphoma (LBL) who have developed an allergy to asparaginase produced from E. coli.
Pharmacokinetics and Efficacy Data from Study JZP458-201
In Study JZP458-201 (NCT04145531), an open-label multicenter experiment in which Rylaze was delivered at various dosages and methods, the pharmacokinetics of Rylaze were assessed in 225 patients. The results were used to create a model to forecast blood asparaginase activity at various timepoints.
Based on a simulation in a fictitious population, the achievement and maintenance of nadir serum asparaginase activity (NSAA) above the level of 0.1 U/mL was used to determine efficacy. Following the 25 mg/m2 dose of Rylaze on Wednesday morning and the 50 mg/m2 dose on Friday afternoon, according to simulation results, the proportion of patients maintaining NSAA 0.1 U/mL would be 91.6% (95% CI: 90.4%, 92.8%) and 91.4% (95% CI: 90.1%, 92.6%), respectively.
Safety Profile and Common Adverse Reactions
Neutropenia, anaemia, or thrombocytopenia were observed in all patients given Rylaze at the indicated dosages as part of multi-agent chemotherapy. Atypical liver tests, nausea, musculoskeletal pain, infections, fatigue, headaches, febrile neutropenia, pyrexia, haemorrhage, stomatitis, abdominal pain, decreased appetite, drug hypersensitivity, hyperglycemia, diarrhoea, pancreatitis, and hypokalemia were the most frequent nonhematological adverse reactions (incidence > 20%) in patients.
View full prescribing information for Rylaze.
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About Dr. Nishant Mittal
Dr. Nishant Mittal is a highly accomplished researcher with over 13 years of experience in the fields of cardiovascular biology and cancer research. Significant contributions to stem cell biology, developmental biology, and innovative research techniques mark his career. Research Highlights Dr. Mittal's research has focused on several key areas: 1) Cardio…
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