WOW I wish I would of known this information before, first off when I took the barium swallow with follow through. I did not want to do ...I dragged my feet . I'm female and weigh about 100 pounds and I was scared to death when they handed me the barium to drink I literally stepped back ...it is almost an instinctive response we are animals you know..I drank a little they did not make me drink it all because I'm so small but I did have to drink some. I returned home did three coffee enemas now I wonder if this is what made me so sick ...all the chalky barium stuff exited the body. I had hives, the next day cardiac arrest symptoms...straight to the er ...the next day heart pounding, blood pressure up breathing difficultes took bendryl...next day felt like I was going to die cardiac arrest symptoms again I got hooked up to ekg for three hours they did the ER stuff. Barium is dangerous because it is toxic poison. There must be another way for them to check your GI anyhow never again!