Positioning of the needle during a nerve block may result in touching the nerve to be blocked with the tip of the needle. When this occurs, you may experience a sharp sensation like an electrical shock in the part of the body supplied by the nerve. Be sure to let your anesthesiologist know if you feel such a sensation.
Other medicines are often given with nerve blocks to make you relaxed or sleepy (sedatives) or to reduce pain. These are usually given as a pill or through a vein (intravenously, IV).