The Inbetweeners actress was examining the UK's binge drinking culture for the BBC Three show, which is part of the channel's Dangerous Pleasures season.
Speaking about her filmed night out with a group of students, Atack told The Mirror: "By the end of the five-hour clubbing session, I'd drunk about 15 vodkas, some of them doubles.
"It was an experiment and I had to keep up with the students. I've had some hangovers before but that was something else. I just wanted to die. I went back to see the students and they had lectures, but they seemed all right.
"They must have built up a tolerance to it. I had to stop filming so I could be sick. I must have done it about five times."
Speaking about the country's drink culture, she added: "It's so depressing, so undignified and humiliating. Girls are collapsed in the street and have their skirts up round their necks. Some have crapped themselves. It's disgusting. It's so dangerous too, especially for the girls."