Phenytoin-d10 is a deuterated isotope-labelled phenytoin for isotope tracing. Phenytoin acts as a voltage-gated Na⁺ channel blocker and t-type Ca²⁺ channel inhibitor, exhibiting antiepileptic activity.
Cytochrome P450 2C9 is a cytochrome P-450 subtype that possesses specificity for acidic xenobiotics. It oxidizes a wide range of important clinical drugs under the categories of nonsteroidal anti-inflammatory agents, anticoagulants, hypoglycemic agents, a