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An opioidergic mechanism behind the effects of milnacipran was indicated by a partial reversal of these effects with naloxone .
 Chemical: milnacipran; Chemical: naloxone
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: milnacipran; Chemical: naloxone