1000
In TS patients with comorbid attention deficit hyperactivity disorder ( ADHD ) atomoxetine , stimulants or clonidine should be considered , or , if tics are severe , a combination of stimulants and risperidone .
 Chemical: atomoxetine; Chemical: clonidine; Chemical: risperidone
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: atomoxetine; Chemical: clonidine; Chemical: risperidone