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  • Title: Antihypertensive effects of nisoldipine and reference drugs in certain types of hypertensive rats.
    Author: Tasaka K, Kamei C, Tagami H, Hokonohara T, Sugimoto Y.
    Journal: Arzneimittelforschung; 1987 Mar; 37(3):316-21. PubMed ID: 3297074.
    Abstract:
    The hypotensive effects of nisoldipine (Bay K 5552), compared with those of nifedipine, nicardipine and hydralazine, in normotensive rats (NR), spontaneously hypertensive rats (SHR), DOCA-NaCl hypertensive rats (DNR) and renal hypertensive rats (RHR), were studied. The changes in plasma renin activity (PRA) after treatment with nisoldipine and these reference drugs were also studied. The results of this study revealed that: 1. Nisoldipine caused more potent antihypertensive effects in SHR, DNR and RHR than in NR. 2. The antihypertensive effects of nisoldipine in SHR were almost equipotent to those of nifedipine, nicardipine and hydralazine. However, in NR, DNR and RHR, the effects of nisoldipine were weaker than those of the reference drugs. 3. The positive chronotropic effects of nisoldipine were less remarkable than those elicited by nifedipine, nicardipine and hydralazine in all types of hypertensive rats, except SHR. 4. As did nifedipine and nicardipine, nisoldipine caused an increase of the plasma renin activity in NR and SHR, though its potency was weaker than those of nifedipine and nicardipine.
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