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]: Retinoic acid may increase the risk of bone marrow transplant nephropathy.
[A]: Retinoic acid


[Q]: The patient received only the ophthalmic sulfonamide, and it was used for one day, but he developed Stevens-Johnson syndrome.
[A]: sulfonamide


[Q]: As these cases revealed, close monitoring of blood chemistry is mandatory after starting spironolactone, and patients should be advised to stop spironolactone immediately if diarrhoea develops.
[A]:
spironolactone