3583
Both drugs impaired immediate free recall but the decrease was greater for diazepam than propranolol .
 impaired immediate free recall, diazepam, propranolol
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 impaired immediate free recall, diazepam, propranolol