Objectives: Thioguanine (TG) has been shown as a safe alternative in adults with inflammatory bowel disease (IBD) who did not tolerate conventional thiopurines [azathioprine (AZA)/mercaptopurine]. However, data in pediatric IBD are scarce. Therefore, we aimed to assess the safety of TG as maintenance therapy. Methods: A retrospective, multicenter cohort study of children with IBD on TG was performed in the Netherlands. TG-related adverse events (AE) were assessed and listed according to the common terminology criteria for AE. Results: Thirty-six children with IBD (median age 14.5 years) on TG (median dose 15 mg/day) were included in 6 centers. Five AE occurred during follow-up [pancreatitis (grade 3), hepatotoxicity (grade 3) (n = 2), Clostridium difficile infection (grade 2), and abdominal pain (grade 2)]. All patients (n = 8) with a previously AZA-induced pancreatitis did not redevelop pancreatitis on TG. Conclusions: In pediatric IBD, TG seems a safe alternative in case of AZA-induced pancreatitis. Further research assessing long-Term TG-related safety and efficacy is needed.
|Journal||Journal of Pediatric Gastroenterology and Nutrition|
|Publication status||Published - 1 Dec 2022|
Bibliographical noteFunding Information:
N.K.H.d.B has served as a speaker for AbbVie and MSD has served as consultant and/or principal investigator for TEVA Pharma BV and Takeda. He has received a (unrestricted) research grant from Dr Falk, TEVA Pharma BV, MLDS and Takeda. L.d.R. has been involved in industry sponsored studies, investigator initiated study and/or consultancy with AbbVie, Lilly, Takeda, Janssen and Pfizer and received research grants from ZonMw, ECCO, and Pfizer. All authors declare that they have seen and approved the final version of the manuscript. The remaining authors report no conflicts of interest.
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