tokens: On the other hand , the pressor response to i . c . carbachol ( 1 mug ) was almost completely blocked by i . c . atropine ( 3 mug ) or hexamethonium ( 500 mug ) , and significantly reduced by i . c . chlorpromazine ( 50 mug ) but significantly potentiated by i . c . desmethylimipramine ( 30 mug ) .