Sensorcaine (Bupivacaine HCL) 0.25% with Epinephrine 1:200,000 (as bitartrate) Multi-Dose 50 mL Vials x 25/TraySensorcaine (bupivacaine HCl) injections are sterile isotonic solutions that contain a local anesthetic agent with and without epinephrine (as bitartrate) 1: 200,000 and are administered parenterally by injection. Local anesthetics block the generation and the conduction of nerve impulses, presumably by increasing the threshold for electrical excitation in the nerve, by slowing the propagation of the nerve impulse, and by reducing the rate of rise of