tokens: The basal MAP of conscious SHR was reduced to a similar extent by prazosin (- 23 %(-)- 26 % MAP ) and rauwolscine (- 16 %(-)- 33 % MAP ). However , the head - up tilt induced orthostatic hypotension in the SHR treated with prazosin (- 16 % MAP , n = 6 ), but not in the SHR treated with rauwolscine ( less than + 2 % MAP , n = 6 ). 3 .