In dentistry, the most generally used local anesthetic is lidocaine (also called xylocaine or lignocaine), a modern extra for procaine (also known as Novocain). Its half-life in the body is near 1.5–2 hours. Other local anesthetic mediators in existing use contain articaine (also called septocaine or ubistesin), bupivacaine (a long-acting anesthetic), Prilocaine (also called Citanest), and mepivacaine (also called Carbocaine or Polocaine). A mixture of these may be used reliant on the situation.