Teacher: In this task, you will be given sentences and a drug name in which your task is to indicate the doses of intake of that particular drug. A dose refers to a specified amount of medication taken at one time. Although there might be several correct answers, you need to write one of them.
Teacher: Now, understand the problem? If you are still confused, see the following example:
An episode of subacute encephalopathy after the infusion of methotrexate (1500 mg/m2) (MTX) is reported in a young adult with metastastic gastric cancer.	 methotrexate
Solution: 1500 mg/m2
Reason: Here, the drug methotrexate mentioned after '	 ' has been mentioned to be taken as 1500 mg/m2 within brackets and hence should be tagged as dosage.

Now, solve this instance: A case of severe visual loss following a single dose of vincristine is described.	 vincristine
Student:
single dose