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.

Q: Reversible sclerotic changes of lumbar spine and femur due to long-term oral isotretinoin therapy.

A: isotretinoin
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Q: We describe 3 elderly patients with moderate to severe ataxia that occurred while they were taking propafenone.

A: propafenone
****
Q: In this paper, we report a patient with primary anti-phospholipid syndrome treated by corticosteroid, who developed disseminated nocardiosis.

A:
corticosteroid
****