Subcutaneous Interval Lengthening of Vedolizumab for Economic Research

Rationale: Subcutaneous vedolizumab is an effective maintenance therapy for patients with inflammatory bowel disease. Patients using subcutaneous vedolizumab (every 2 weeks) have higher vedolizumab serum trough concentrations than those who are treated with intravenous vedolizumab (every 4-8 weeks). Since biologic therapies such as vedolizumab are expensive, lengthening of the injection interval (de-escalation) is of interest to reduce health care costs. However, maintaining remission while extending vedolizumab injection intervals has not been evaluated yet but represents a critical component of both medical and societal costs. Studies have suggested that higher vedolizumab serum concentrations are associated with superior clinical outcomes. Our strategy is to administer subcutaneous vedolizumab with prolonged intervals using therapeutic drug monitoring, i.e. dose based on vedolizumab concentrations, to reduce medical and societal costs while preserving remission. Objectives: To evaluate whether subcutaneous vedolizumab therapeutic drug monitoring (TDM)-guided de-escalation will be cost-effective, compared to normal dosing regimen in patients with inflammatory bowel disease in remission. The secondary objective is to investigate the efficacy of TDM-guided de-escalation subcutaneous vedolizumab dosing compared to standard dosing. Study design: This is a single-centre, randomized controlled, open-label pilot study. Study population: 40 patients with inflammatory bowel disea…

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Suzanne Anjie, MD  ·  +31655592173  ·  s.i.anjie@amsterdamumc.nl

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