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: Depressive symptoms disappeared after interferon therapy was stopped.
Example Output: interferon

Example Input: Hyponatraemia developed after rechallenge with controlled release carbamazepine.
Example Output: carbamazepine

Example Input: However, because diphenhydramine also exhibits type IA sodium channel blockade, cardiac toxicity is also possible.
Example Output:
diphenhydramine