Sabrina Seeling seemed too young to die. ... One night she stayed up all night translating a Latin text into English for a college paper. ... During the all-nighter, Ms. Seelig took Ephedra, a stimulant diet drug that had been banned by the Food and Drug Administration three years earlier, and had a few beers. ... When she felt sick, she called Poison Control for help, and spoke very clearly, a recording of the call shows.