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.
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Question: Regression of thyrotoxic ophthalmopathy following lithium withdrawal.

Answer: lithium


Question: A 40-year-old man with advanced HIV infection and Mycobacterium avium complex infection experienced rapid cognitive decline after commencement of ethambutol, and symptoms fully resolved with cessation.

Answer: ethambutol


Question: Transfusion haemosiderosis inspite of regular use of desferrioxamine: case report.

Answer:
desferrioxamine