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Detailed View: Safety Labeling Changes Approved By FDA Center for Drug Evaluation and Research (CDER)
- As with all therapeutic proteins, there is potential for immunogenicity. In clinical trials, 121 patients who received one (n=99), two (n=21), or three (n=1) doses of VORAXAZE were evaluated for anti-glucarpidase antibodies. Twenty-five of these 121 patients (21%) had detectable anti-glucarpidase antibodies following VORAXAZE administration, of which 19 received a single dose of VORAXAZE and 6 received two doses of VORAXAZE. Antibody titers were determined using a bridging enzyme-linked immunosorbent assay (ELISA) for antiglucarpidase antibodies. Neutralizing antibodies were detected in 11 of the 25 patients who tested positive for antiglucarpidase binding antibodies. Eight of these 11 patients had received a single dose of VORAXAZE.