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In spontaneously hypertensive , stroke - prone rats , microinjection of methyldopa into the area of the midline B3 serotonin cell group in the ventral medulla caused a potent hypotension of 30 - 40 mm Hg , which was maximal 2 - 3 h after administration and was abolished by the serotonin neurotoxin 5 , 7 - dihydroxytryptamine ( 5 , 7 - DHT ) injected intracerebroventricularly .
 Disease: hypertensive; Disease: stroke; Chemical: methyldopa; Chemical: serotonin; Disease: hypotension; Chemical: serotonin; Chemical: 5 , 7 - dihydroxytryptamine; Chemical: 5 , 7 - DHT
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: hypertensive; Disease: stroke; Chemical: methyldopa; Chemical: serotonin; Disease: hypotension; Chemical: serotonin; Chemical: 5 , 7 - dihydroxytryptamine; Chemical: 5 , 7 - DHT