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The average hearing loss for speech frequencies was about 10 dB after prilocaine and 15 dB after bupivacaine .
 hearing loss, prilocaine, bupivacaine
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 hearing loss, prilocaine, bupivacaine