Serum (1 ml)
Trough (pre dose) specimen required
AU/mL (Arbitrary Units per mL)
NHS referral price
Immunogenicity to biologic drugs such as vedolizumab is a possible cause of treatment failure. The assay used to measure antibodies to Vedolizumab is drug-sensitive and can only detect ‘free’ antibodies that are unbound to drug, meaning that antibodies are unlikely to be detected in the presence of Vedolizumab drug. On this basis we will only perform anti-drug antibody analysis after the drug level has been analysed and is found to be <3.1 mg/L.
Free Antibody concentration >/= 10 AU/mL is positive.
4 working weeks
We welcome referrals for Vedolizumab total Ab monitoring. If you are a new requestor please complete the following form: New requestor form.
We now also have the option to use NPEx for referral requesting.
Further information about sample requirements for this test can be found here: Vedolizumab and Anti-Vedolizumab Antibodies – further informationSpecimen Labelling Procedure