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]: Regression of thyrotoxic ophthalmopathy following lithium withdrawal.
[A]: lithium


[Q]: CONCLUSION: Long-term treatment with rifabutin may have a reversible and previously undescribed side-effect on retinal function.
[A]: rifabutin


[Q]: We report a patient with type 2 diabetes mellitus who, while treated with the antitumor necrosis factor-alpha blocking agent etanercept for severe plaque psoriasis, experienced persistent hypoglycemia requiring the lowering and eventual elimination of his previous insulin regimen.
[A]:
etanercept