Overview
11 DESCRIPTION Asparaginase erwinia chrysanthemi (recombinant)-rywn contains an asparagine specific bacterial enzyme (L-asparaginase). L-asparaginase is a tetrameric enzyme that consists of four identical 35 kDa subunits with a combined molecular weight of 140 kDa. The amino acid sequence is identical to native asparaginase Erwinia chrysanthemi (also known as crisantaspase).
Mechanism of Action
12 CLINICAL PHARMACOLOGY 12.1 Mechanism of Action Asparaginase erwinia chrysanthemi (recombinant)-rywn is an enzyme that catalyzes the conversion of the amino acid L-asparagine into aspartic acid and ammonia. The pharmacological effect of RYLAZE is based on the killing of leukemic cells due to depletion of plasma asparagine. Leukemic cells with low expression of asparagine synthetase have a reduced ability to synthesize asparagine, and therefore depend on an exogenous source of asparagine for survival. 12.2 Pharmacodynamics Asparaginase erwinia chrysanthemi (recombinant)-rywn exposure-response relationships and the time course of pharmacodynamic response are unknown. 12.
Indications
- 1 INDICATIONS AND USAGE RYLAZE is indicated 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 1 month or older who have developed hypersensitivity to E. coli -derived asparaginase. RYLAZE is an asparagine specific enzyme indicated 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 1 month or older who have developed hypersensitivity to E.
Common Doses
- 25 mg
- 50 mg
- 2 mL
Dosage
2 DOSAGE AND ADMINISTRATION There are two RYLAZE regimens that can be used to replace a long-acting asparaginase product. The recommended dosages of RYLAZE are: When administered every 48 hours • 25 mg/m 2 intramuscularly every 48 hours; When administered Monday/Wednesday/Friday • 25 mg/m 2 intramuscularly on Monday morning and Wednesday morning and 50 mg/m 2 intramuscularly on Friday afternoon. ( 2.1 ) 2.1 Recommended Dosage There are two RYLAZE regimens that can be used to replace a long-acting asparaginase product.
Contraindications
- 4 CONTRAINDICATIONS RYLAZE is contraindicated in patients with: • History of serious hypersensitivity reactions to Erwinia asparaginase , including anaphylaxis [see Warnings and Precautions ( 5.1 )] ; • History of serious pancreatitis during previous asparaginase therapy [see Warnings and Precautions ( 5.2 )] ; • History of serious thrombosis during previous asparaginase therapy [see Warnings and Precautions ( 5.3 )] ; • History of serious hemorrhagic events during previous asparaginase therapy [see Warnings and Precautions ( 5.
Side Effects
- 6 ADVERSE REACTIONS The following clinically significant adverse reactions are described in greater detail in other sections of the labeling: • Hypersensitivity Reactions [see Warnings and Precautions ( 5.1 )] • Pancreatic Toxicity [see Warnings and Precautions ( 5.2 )] • Thrombosis [see Warnings and Precautions ( 5.3 )] • Hemorrhage [see Warnings and Precautions ( 5.4 )] • Hepatotoxicity, including VOD [see Warnings and Precautions ( 5.
Interactions
- No major interactions listed on the FDA label. Always consult a healthcare professional.