All current local anesthetics block sensory signals—pain—but they also interrupt motor signals, which can be problematic. For example, too much epidural anesthesia can prevent mothers in labor from ...

Paresthesia occurs more often after use of 4% local anesthetic formulations, according to a study in the Journal of the American Dental Association (July 2010, Vol. 141:7, pp. 836-844). Researchers ...