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Hyperprolactinemia was induced by treatment with haloperidol , a dopamine receptor antagonist , and Palkovits ' microdissection technique in combination with high - performance liquid chromatography was used to measure neurotransmitter concentrations in several areas of the brain .
 Disease: Hyperprolactinemia; Chemical: haloperidol; Chemical: dopamine
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:
 Disease: Hyperprolactinemia; Chemical: haloperidol; Chemical: dopamine