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: A young patient experienced marked sinus tachycardia while smoking marijuana and receiving therapeutic doses of nortriptyline.
Example Output: nortriptyline

Example Input: Both patients developed hypoadrenalism while on o,p'-DDD and apparently adequate dexamethasone replacement therapy.
Example Output: o,p'-DDD

Example Input: Occasionally, despite good therapeutic response, clozapine must be stopped due to dangerous side effects such as agranulocytosis.
Example Output:
clozapine