Barium yep thats what its called, ive had many many ultrasounds in my life (i have a lot of medical issues) ive had both the iv contrast and the barium, I have never been able to drink the entire thing they try to get me to, but I did have some good stuff when I was little, it was at childrens hospital and it tasted just like koolaid, I had to drink almost 3 glasses instead of just one but it was worth it....Sorry for the rambliness, im hyper, for some reason today ^_^
~alicia~