Posted 8/30/2010 5:02 PM (GMT 0)
One time it took me around 45 minutes, and one time it actually took 3 hours! (The 3 hours time was VERY painful!! And I was even eating just soft foods a few days before the liquid diet.) During the 3 hour wait, I called the GI on-call fellow, and they said the prep should kick in within 4 hours, usually within an hour.