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:
Depressive symptoms disappeared after interferon therapy was stopped.

Ex Output:
interferon


Ex Input:
Thalidomide was withdrawn from world markets in 1961 following recognition of its teratogenic effects.

Ex Output:
Thalidomide


Ex Input:
PURPOSE: To describe bilateral corneal endothelial dysfunction in a patient with Parkinson disease who was treated with long-term amantadine.

Ex Output:

amantadine