in conscious dogs , alpha 2-blockade ( 0.3 mg/kg rauwolscine , n = 10 ) increased mean arterial pressure by 40 mm hg , while hypotension by 8 mm hg occurred following nonselective alpha-blockade ( 1.5 mg/kg phentolamine , n = 9 ) and by 20 mm hg following alpha 1-blockade ( 1.2 mg/kg prazosin , n = 10 ) .
C0020649
hypotension
C0032912
prazosin