916
We suggest that trazodone ( 5 , 10 and 20 mg / kg ) , by blocking the 5 - HT 2C receptors , releases the nigrostriatal DAergic neurons from tonic inhibition caused by 5 - HT , and thereby potentiates dexamphetamine stereotypy and antagonizes haloperidol catalepsy .
 Chemical: trazodone; Chemical: 5 - HT; Chemical: 5 - HT; Chemical: dexamphetamine; Chemical: haloperidol; Disease: catalepsy
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: trazodone; Chemical: 5 - HT; Chemical: 5 - HT; Chemical: dexamphetamine; Chemical: haloperidol; Disease: catalepsy