Glucarpidase + Pemetrexed

MediHelp rates the interaction as minor. Glucarpidase and Pemetrexed have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Glucarpidase is an enzyme that cleaves the glutamate residue from folates and classical antifolates. Pemetrexed has a glutamate moiety and may therefore be hydrolyzed, which could lower its exposure and reduce antitumor effect if given close in time. The clinical relevance is uncertain because glucarpidase is used for methotrexate toxicity.

MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid giving pemetrexed within the period around a glucarpidase dose unless clinically required, and review the intended pemetrexed schedule if glucarpidase is used for methotrexate rescue.

MediHelp also lists interactions of Pemetrexed with, for example, Bacitracin, Brexucabtagene autoleucel, Celecoxib. The full list is on the Pemetrexed page.