18523
Second - generation antipsychotics , which have become the standard drug therapies for schizophrenia , are known to have a serotonin 5 - HT2A receptor blocking effect in addition to a dopamine D2 receptor blocking effect .
 Chemical: serotonin; Chemical: dopamine
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: serotonin; Chemical: dopamine