[Effect of furosemide, potassium canrenoate and D-L-propranolol on blood pressure in spontaneously hypertensive rat].

Spontaneously hypertensive rats (japanese strain) have been treated with furosemide, potassium canrenoate or d-l-propranolol. Present results indicate that: 1)furosemide admiinistration, from the 3rd to the 15th week of life, does not prevent the development of hypertension but the blood pressure rises more slowly in treated rats. In the established phase of hypertension furosemide administration produces a decrease in blood pressure; the blood pressure increases rapidly after cessation of the treatment. 2) potassium canrenoate, injected from the 3rd to the 14th week of life, does not prevent the rise in blood pressure.3) d-l-propranolol, administered from the 5th to the 34th week of life, is without effect on the development of hypertension, though it significantly decreases heart rate.