Potent, selective and competitive vanilloid TRPV1 (VR1) receptor antagonist (pA2 = 7.71 at hVR1); antagonizes hTRPV1 receptors activated by agonists, noxious heat, but not protons. Displays selectivity over a wide range of receptors and systems including CB1 and CB2 receptors, voltage-gated Ca2+ channels and the hyperpolarization-activated current (Ih). Also available as part of the Vanilloid TRPV1 Receptor Tocriset™.