25180
Our findings suggest that brain CYP2D affects brain morphine levels after peripheral codeine administration , and may thereby alter codeine ' s therapeutic efficacy , side - effect profile and abuse liability .
 Chemical: morphine; Chemical: codeine; Chemical: codeine
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: morphine; Chemical: codeine; Chemical: codeine