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The administration of phenobarbitone and carbamazepine for 21days caused a significant impairment of learning and memory as well as an increased oxidative stress .
 phenobarbitone, carbamazepine, impairment of learning and memory
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 phenobarbitone, carbamazepine, impairment of learning and memory