598
This work evaluates the antinociceptive and constipating effects of the combination of 3 . 2 mg / kg s . c . morphine with 177 . 8 mg / kg s . c . metamizol in acutely and chronically treated ( once a day for 12 days ) rats .
 constipating, morphine, metamizol
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 constipating, morphine, metamizol