clonidine ( 1.0 , 5.0 and 25 microgram/kg , i.v . ) , xylazine ( 62.5 , 125 and 250 microgram/kg , i.v . ) and reserpine ( 0.5 and 2.0 mg/kg , i.v . ) all caused considerable hypotension but had no effect on the response to tilting of the systemic circulation , apart from somewhat prolonging recovering time .
C0035179
reserpine
C0020649
hypotension