BACKGROUND: Cladribine is an antimetabolite used for the treatment of relapsing-remitting multiple sclerosis. At present, there are no data available on its use in breastfeeding mothers and its transfer in human milk. OBJECTIVE: We present a case of a lactating mother who donated her milk samples to study the transfer of cladribine following a 20-mg oral dose. METHODS: Analysis was done using liquid chromatography-mass spectrometry. RESULTS: The relative infant dose calculated in this study was 3.06%. CONCLUSION: This is the first case report suggesting the transfer of cladribine in human milk in measurable quantities. However, caution should be advised during lactation.
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Datta et al. (2020) studied this question.
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