Management of acute oral poisoning: Due to the low bioavailability of MTX, treatment is not necessary for single ingestions. Oral folinic acid may be used to lower the bioavailability further with large ingestions >1 g m-2. Oral followed by intravenous folinic acid may be used in patients with staggered ingestion >36 h or patients with acute overdose and renal impairment (eGFR <45 mL/min/1.73 m2).
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