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.

Input: Consider Input: Four patients receiving high-dose tamoxifen for greater than 1 year have demonstrated similar retinal changes.

Output: tamoxifen


Input: Consider Input: Thalidomide was withdrawn from world markets in 1961 following recognition of its teratogenic effects.

Output: Thalidomide


Input: Consider Input: Myoclonic spasms following intrathecal morphine.


Output: morphine