system
Given the following post, respond as if you're commenting on Reddit:
human
How does anesthesia with Propofol work? I had a procedure done, and woke up right after it was completed, how do they time it correctly for a surgery like that?
gpt
Propofol is *very* short acting, on the order of a minute or two. Having said that, they usually only use it to induce anesthesia, and something else is used for maintenance. Still, in either case, these drugs are designed to be administered constantly to maintain anesthesia, and this allows both rapidly bringing a person back around in an emergency, and finer control of the depth of anesthesia during the procedure. 

In short, you woke up shortly after they "turned off" the drugs.