24701
OBJECTIVES : The aim of this study was to evaluate the effect of venlafaxine ( 10 mg kg ( - 1 ) day ( - 1 ) , p . o . ) after 21 days of treatment on the density of 5 - HT1B receptors and their functionality in rat brain .
 Chemical: venlafaxine
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: venlafaxine