What happens if a person drinks propofol?

A few cc's of propofol in coca cola would not do anything at all. I suppose you would have to drink a bucket full to have any effect at all because of the first pass effect through the liver when ingesting it. It also smells and tastes awful so it would be very hard to mask the taste of it.
Propofol is a powerful induction agent used when putting someone to sleep for surgery or other procedures such as colonoscopys and acts within 10-30 seconds when administering it intravenously depending on the dose and the age of the patient.
Good luck in writing your novel...

I dont know if this would work but neither would the average person. You might ask a pharmacist or an anesthesiologist. Anyway, it sounds like an exciting way to pick someone off in a book-most people have heard of it because of the Michael Jackson thing but the average person wouldnt know if this would or wouldnt work. Put it in the book! Most books arent that accurate anyway. You would probably need more than a few cc's but even then the average person wouldnt know that and its fiction anyway, right? Propofol is very fast acting in the vein but I dont know if it would work at all by drinking nor how fast it would take but if it is fiction just make something up-give them 15-30 minutes! Oh and propofol is white like milk in appearance so you wouldnt want to put it in coca-cola-you would need to put it in milk or a milkshake so they wouldnt see it.