998
As first - line treatment of tics risperidone ( best evidence level for atypical antipsychotics ) or tiapride ( largest clinical experience in Europe and low rate of adverse reactions ) are recommended .
 Chemical: risperidone; Chemical: tiapride
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: tiapride