In this task, you will be given sentences in which your task is to recognize the name of the drug or medicine. Drugs are substances that change a person's mental or physical state. They can affect how your brain works, how you feel and behave, your understanding, and your senses. Although there might be several correct answers, you need to write one of them.

[Q]: A lethal complication of peripheral vein vasopressin infusion.
[A]: vasopressin


[Q]: DESIGN: We reviewed the medical records of four patients, who were seen by us between July 2000 and February 2004 for sudden onset of a central neurological syndrome within days of intrathecal MTX.
[A]: MTX


[Q]: Cephalexin rash in infectious mononucleosis.
[A]:
Cephalexin