“…Erosive mucositis from MTX has been reported and may herald impending cytopenias, which may progress to fatal bone marrow failure (Demirkan et al, 2017, Knoll et al, 2016). Risk factors include dose escalations or treatment reinitiation, hypoalbuminemia, renal insufficiency, and use of certain drugs that displace MTX from plasma proteins or decrease its excretion, such as nonsteroidal anti-inflammatory drugs, sulfonamides, aspirin, or other antibiotics (Dervisoglou and Matiakis, 2015, Knoll et al, 2016). Folate or folinic acid substitution, as well as alkalinization of the urine, may hasten reversal of MTX-induced erosive mucositis (Dervisoglou and Matiakis, 2015, Knoll et al, 2016).…”