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JOURNAL ARTICLE

Therapeutic drug monitoring for Vedolizumab

Daniela Pugliese, Giuseppe Privitera, Fabrizio Pizzolante, Antonio Gasbarrini, Luisa Guidi, Alessandro Armuzzi
Minerva Gastroenterologica e Dietologica 2019 October 24
31646853
Therapeutic drug monitoring (TDM) is a useful tool for decision-making process in patients with Inflammatory Bowel Disease (IBD) treated with anti TNF-α drugs, especially when experiencing loss of response. Growing evidences support the existence of exposure-response relationship with Vedolizumab, but the utility and the appropriate use of TDM in clinical practice is still under debate. In this review, we summarize all evidences supporting a TDM-guided approach for patients treated with Vedolizumab, suggesting three potential scenarios: 1) early prediction of long-term outcomes; 2) verifying the best strategy in case of loss of response, 3) maximizing therapeutic efficacy during maintenance treatment. Vedolizumab through concentrations < 20 μg/ml at week 6 and > 12 μg/ml seem to be associated with more favourable outcomes. No comparative studies have been conducted so far to demonstrate the advantage of adopting a TDM-guided versus an empirical approach for managing primary or secondary non responses.The frequency of antibodies to Vedolizumab detection is quite low (up to 4% in pivotal trials), suggesting, unlike of anti TNF-α agents, a low probability of experiencing an immune-mediated pharmacokinetic failure in clinical practice. Future prospective and controlled studies are warranted to establish the guidance on the use of a TDM-guided approach with Vedolizumab in clinical practice.

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