7180
When risperidone ( 6 mg / kg ) was co - administered with silymarin ( 40 mg / kg ) to rats orally , the C ( max ) of 9 - hydroxyrisperidone was significantly increased to1 . 3 - fold ( p < 0 . 05 ) , while the other pharmacokinetic parameters did not show any significant differences .
 Chemical: risperidone; Chemical: 9 - hydroxyrisperidone
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: risperidone; Chemical: 9 - hydroxyrisperidone