999
Conservative treatment , including bladder irrigation with physiological saline and instillation of prostaglandin F2 alpha , failed to totally control hemorrhage .
 prostaglandin F2 alpha, hemorrhage
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 prostaglandin F2 alpha, hemorrhage