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.

Ex Input:
The fever abated promptly following discontinuation of acyclovir, and radiographic abnormalities resolved over ten days.

Ex Output:
acyclovir


Ex Input:
Regression of thyrotoxic ophthalmopathy following lithium withdrawal.

Ex Output:
lithium


Ex Input:
This case emphasizes the importance of the evaluation of lithium-associated polyuria with a direct measurement of plasma vasopressin, interpreted with simultaneous plasma and urine osmolality to secure the correct diagnosis and ensure appropriate therapeutic management.

Ex Output:

lithium