4705
Only preservative - free methotrexate in Elliott ' s B Solution at a concentration of not more than 1 mg / ml should be used for intrathecal administration .
 Chemical: methotrexate
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: methotrexate