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Experience with a slow-release formulation of oxprenolol
The New Zealand Medical Journal
|April 12, 1978
Summary
Switching hypertensive patients to once-daily slow-release oxprenolol showed a slight loss of blood pressure control and increased ectopic beats near the 24-hour mark. Twice-daily dosing may offer greater benefits.
Area of Science:
- Cardiology
- Pharmacology
Background:
- Hypertension management often involves multiple daily drug administrations.
- Oxprenolol is a beta-blocker used in antihypertensive regimens.
Purpose of the Study:
- To evaluate the efficacy of once-daily slow-release oxprenolol in hypertensive patients.
- To compare once-daily dosing with previous thrice-daily oxprenolol regimens.
Main Methods:
- Fifteen hypertensive patients on existing antihypertensive therapy (diuretic and thrice-daily oxprenolol) were switched to once-daily slow-release oxprenolol.
- Blood pressure and heart rate were monitored during half-day tests (lying, standing, post-exercise).
Main Results:
- A slight decrease in blood pressure control was observed towards the end of the 24-hour dosing interval.
- Increased frequency of exertional ectopic beats was noted at the end of the 24-hour period.
Conclusions:
- Once-daily slow-release oxprenolol may lead to a temporary loss of blood pressure control.
- A twice-daily regimen (two-thirds morning, one-third evening) might optimize therapeutic advantage.