when nifedipine ( 10 and 100 micrograms/kg ) , nicardipine ( 10 and 100 micrograms/kg ) , nitrendipine ( 10 and 100 micrograms/kg ) , verapamil ( 100 and 1000 micrograms/kg ) and diltiazem ( 100 and 1000 micrograms/kg ) were intravenously administered to shr , at their lower doses , only transient decreases of blood pressure were observed and , even at their higher doses , decreased blood pressures returned to the initial levels after 80 to 120 min .
C0028005
nicardipine
C0020649
decreased blood pressures