Propofol is a very short acting drug, which makes it ideal for use in Office-based anesthesia. Being able to measure the patient's brain response to the propofol with a BIS® monitor greatly increases the accuracy of propofol dosing. Because no benzodiazpeines (Valium, Versed, Ativan, Dalmane) are used with PK technique, patients emerge from propofol hypnosis within 3 to 5 minutes of the propofol infusion being turned off at the end of surgery. Often patients are able to go home, clear headed, within 20 to 30 minutes after their surgery is concluded, with their surgeon's approval.