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.

Input: Consider Input: CASES: "A" was an 8-year-old boy with attention deficit and chronic tic disorder who developed obsessive-compulsive symptoms within 2 weeks of starting risperidone.

Output: risperidone


Input: Consider Input: Based on the clinical status of the patient, it was suspected that several conditions contributed to the abnormal hypersensitivity to warfarin.

Output: warfarin


Input: Consider Input: We describe two patients with aspergillus arthritis of the knee joint following fludarabine-based non-myeloablative stem cell transplantation.


Output: fludarabine