CYP3cide, PF-04981517 is primarily used in research settings as a selective inhibitor of cytochrome P450 3A (CYP3A) enzymes. It is employed to study drug metabolism and enzyme kinetics, particularly to assess the role of CYP3A in the biotransformation of various compounds. By inhibiting this enzyme, researchers can better understand potential drug-drug interactions and evaluate the metabolic stability of new drug candidates. It is also utilized in preclinical studies to modulate the pharmacokinetics of co-administered drugs, helping to improve exposure and efficacy in experimental models. Its selectivity makes it a valuable tool in pharmacology and toxicology studies involving hepatic metabolism.