3431
The methotrexate was administered as a loading dose of 6 , 000 mg / m2 for a period of one hour followed by an infusion of 1 , 200 mg / m2 / h for 23 hours .
 methotrexate
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 methotrexate