The FDA on November 18, 2022, approved a new Monday-Wednesday-Friday dosing regimen for RYLAZE® (Asparaginase erwinia chrysanthemi recombinant-rywn). Under the new regimen, patients should receive 25 mg/m2 intramuscularly on Monday and Wednesday mornings, and 50 mg/m2 intramuscularly on Friday afternoon. It also is approved to be administered every 48 hours at a dose of 25 mg/m2 intramuscularly. RYLAZE® is a product of Jazz Pharmaceuticals.