Fosaprepitant dimeglumine is a Substance P/neurokinin-1 (NK1) receptor antagonist. It is a water soluble prodrug of the antiemetic drug aprepitant.
Fosaprepitant dimeglumine acts as a therapeutic agent to treat chemotherapy-induced nausea and vomiting. It also acts as a weak inhibitor of cytochrome P450 3A4 (CYP3A4).