How is bupivacaine administered?

Multiple ways: Bupivacaine is a long-acting local anesthetic. As such, it can be injected around a site to be operated on (local infiltration), around a nerve or group of nerves supplying an area of the body (a nerve block), into the sac of fluid bathing the spinal cord (spinal block) or outside that sac (epidural block), essentially numbing up a larger area (usually the lower half of the body)