How Long Does Lidocaine Last

There are many types of anesthetic used in dentistry. Modern anesthetics work better, last longer, and have fewer instances of allergic reactions when compared to anesthetics of the past such as Novocaine.

Lidocaine hydrochloride is the one most frequently used as a local anesthetic to block nerve signals in the body prior to operative dental procedures and periodontal deep cleanings. The numbing duration of lidocaine anesthetic can vary from patient to patient based upon their physical makeup as well as the amount of lidocaine administered. The presence of infection may also affect how well the anesthetic works.

For the average person, lidocaine will last from one to four hours. Epinephrine is added to some lidocaine formulations to extend the numbing duration and control bleeding during procedures. Xylocaine and Lignocaine are other names for Lidocaine.