Treatment Protocol of Voraxaze for Patients Experiencing or at Risk of Methotrexate Toxicity
Sponsor: BTG International Inc.
ClinicalTrials ID:NCT00481559
This protocol allows IRB-approved US investigators to access Voraxaze on a cost recovery basis for patients with impaired renal function and toxic MTX levels (>1 micromole/L). Eligible patients receive a single 50 Units/kg IV bolus of Voraxaze over 5 minutes, alongside standard care. Patient data on demographics, MTX, and therapy will be collected.
Patient Parameters
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Program Overview
This protocol is for the treatment of toxic plasma methotrexate concentrations (>1 micromole per liter) in patients with delayed methotrexate clearance due to impaired renal function
Description
This treatment protocol will be available on a cost recovery basis to IRB-approved Investigators treating an eligible patient at any site in the US. In order to continue to make Voraxaze™ available following FDA approval and prior to being commercially available. Protherics needs to charge for the product, so there will be a cost to obtain Voraxaze™ under the Open-Label Treatment Protocol. Protherics is permitted under the FDA regulations (21 CFR 312.8) to charge for Voraxaze, to recover those costs associated with its manufacture, research and development, and handling, but do not include other commercial costs (profit).
Patient eligibility is based on MTX concentrations and laboratory values obtained per standard of care. Once an Investigator identifies a potential patient, he/she will contact the Voraxaze central call center (1-877-398-9829) to receive information regarding drug shipment. Eligible patients will have routine demographic, MTX, and Voraxaze therapy information collected.
Each patient will receive a single dose of Voraxaze 50 Units/kg in a bolus intravenous injection over 5 minutes. In addition to Voraxaze, patients will continue to receive standard of care treatment including leucovorin therapy, and supportive care such as hydration, alkalinization of urine and, if necessary, hemoperfusion/dialysis.
Eligibility Criteria
Inclusion Criteria
- Male or female patients of any age who are experiencing delayed MTX clearance due to impaired renal function will be eligible to receive Voraxaze if the have toxic plasma MTX concentrations (>1 micromole per liter).
Exclusion Criteria
- Voraxaze is not indicated for use in patients who exhibit the expected clearance of MTX (plasma MTX concentrations within 2 standard deviations of the mean MTX excretion curve specific for the dose of MTX administered) or those with normal or mildly impaired renal function because of the potential risk of sub therapeutic exposure to MTX.
- Patients with known hypersensitivity to Voraxaze (glucarpidase, carboxypeptidases)
Patients intolerant to lactose in food (e.g., dairy products) can still receive Voraxaze.
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