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 Q]: Nineteen cases of allergic contact dermatitis to compound tincture of benzoin are described.
[EX A]: benzoin

[EX Q]: We describe a case of subcutaneous metastasis along the needle track after percutaneous ethanol injection (PEI) for treatment of hepatocellular carcinoma.
[EX A]: ethanol

[EX Q]: Premature closure of the ductus arteriosus: variable response among monozygotic twins after in utero exposure to indomethacin.
[EX A]:
indomethacin