3855
This complication reappeared on day 25 during the second dose of 5 - fluorouracil and folinic acid , which were then the only drugs given .
 5 - fluorouracil, folinic acid
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 5 - fluorouracil, folinic acid