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Drug Safety-related Labeling Changes (SrLC)

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METHOTREXATE SODIUM (NDA-008085)

(METHOTREXATE SODIUM)

Safety-related Labeling Changes Approved by FDA Center for Drug Evaluation and Research (CDER)

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05/04/2020 (SUPPL-71)

Approved Drug Label (PDF)

Other

Physicians Labeling Rule (PLR) Conversion - extensive changes; please refer to label)

03/15/2018 (SUPPL-68)

Approved Drug Label (PDF)

5 Warnings and Precautions

PRECAUTIONS

Drug Interactions

(additions underlined)

The use of nitrous oxide anesthesia potentiates the effect of methotrexate on folate-dependent metabolic pathways, resulting in the potential for increased toxicity such as stomatitis, myelosuppression, and neurotoxicity. Avoid concomitantnitrous oxide anesthesia in patients receiving methotrexate. Use caution when administering methotrexate after a recent history of nitrous oxide administration.