3559
The effect of naloxone could be antagonized with morphine ( 1 , 3 , and 10 mg / kg ) , demonstrating the opioid specificity of the naloxone effect .
 Chemical: naloxone; Chemical: morphine; Chemical: naloxone
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: naloxone; Chemical: morphine; Chemical: naloxone