Description_x000D_ Packaging_x000D_ 5, 25 mg in glass bottle_x000D_ Biochem/physiol Actions_x000D_ PF-04457845 is a potent, orally active, irreversible inhibitor of fatty acid amide hydrolase (FAAH), the principle enzyme involved in the degradation of the endocannabinoid anandamide. PF-04457845 is a covalent inhibitor that carbamylates FAAH′s serine nucleophile. It was shown to be both potent and selective against other serine hydrolases. It has an IC50 value of 7.2 nM for human FAAH. The endocannabinoid system is a target for therapeutic pain relief. In a rat model of inflammatory pain, PF-04457845 produced significant reduction of inflammatory pain with efficacy comparable to that of naproxen at 10 mg/kg._x000D_ Other Notes_x000D_ This compound was developed by Pfizer for Neuroscience research. To learn more about Sigma′s partnership with Pfizer and view other authentic, high-quality Pfizer compounds, visit sigma.com/bsm-pfizer._x000D_ To browse the list of other pharma-developed compounds and Approved Drugs/Drug Candidates, click here._x000D_ Legal Information_x000D_ Sold for research purposes under agreement from Pfizer Inc._x000D_ Pfizer is a registered trademark of Pfizer, Inc.