1950
OBJECTIVES : The objectives of this study were to examine the relationship between APOE epsilon4 and subjective effects of trihexyphenidyl on measures reflecting sedation and confusion and to investigate the relationship between trihexyphenidyl - induced subjective effects and objective memory performance .
 Chemical: trihexyphenidyl; Disease: confusion; Chemical: trihexyphenidyl
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: trihexyphenidyl; Disease: confusion; Chemical: trihexyphenidyl