Pharmacokinetics and Pharmacodynamics of Alprenolol in the Treatment of Hypertension. II. Relationship to Its Effect on Blood Pressure and Plasma Renin Activity
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The kinetics of alprenolol, in relation to its effect on blood pressure and plasma renin activity, have been studied in sixteen patients. A within-patient comparison was made between therapy for six weeks with placebo or alpronolol 200 mg thrice daily. Thirteen patients responded to alprenolol by a signoficant fall in blood pressure. In three other patients treatment did not lower blood pressure. In the group as a whole there was no significant correlation between the fall in systolic, diastolic or mean blood pressure, and the steady-state plasma alprenolol concentration, renin status, or degree of beta blockade. However, the thirteen responsive patients showed a significant relationship (p less than 0.05 - 0.001) between the log mean steady-state plasma alprenolol concentration and the hypotensive response.
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