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]: Acute renal failure in a child associated with acyclovir.
[A]: acyclovir


[Q]: We report a case of a patient with rheumatoid arthritis treated with low-dose methotrexate (15 mg/week) who developed infection with both M. tuberculosis and M. chelonae after the revision of a prosthetic hip.
[A]: methotrexate


[Q]: Development of porphyria cutanea tarda after treatment with cyclophosphamide.
[A]:
cyclophosphamide