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.

Example Input: The authors describe a patient with hemiparesis who developed the syndrome of irreversible lithium-effectuated neurotoxicity (SILENT) while being treated with lithium for a manic episode.
Example Output: lithium

Example Input: Nabumetone-associated interstitial nephritis.
Example Output: Nabumetone

Example Input: The patient's clinical presentation, histologic features on liver biopsy and favorable course after stopping the drug suggest that barbiturates can be added to the list of agents which can cause submassive hepatic necrosis.
Example Output:
barbiturates