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Labetalol in general practice: a review
Insights
Labetalol effectively treats hypertension in many patients, with significant response rates in both severe and mild cases. Side effects were generally mild and transient, with no significant drug interactions observed.
Area of Science:
- Pharmacology
- Cardiovascular Medicine
- General Practice
Background:
- Hypertension remains a significant global health concern.
- Effective and safe antihypertensive medications are crucial for patient management.
Purpose of the Study:
- To review the efficacy and safety of labetalol in treating hypertensive patients in general practice.
- To assess the response rates and side effect profile of labetalol across different severity levels of hypertension.
Main Methods:
- A review of published literature and unpublished data on labetalol treatment.
- Analysis of data from 8573 hypertensive patients treated for 1 month to 5 years.
- Evaluation of response rates based on diastolic blood pressure and side effect withdrawal rates.
Main Results:
- Satisfactory responses were observed in 60-80% of severe hypertensives and up to 88% of mild to moderate hypertensives.
- Labetalol's antihypertensive effect was consistent regardless of administration frequency (twice or thrice daily).
- Withdrawal rates due to side effects ranged from 6% to 13%, with common side effects including tiredness and dizziness, often transient.
Conclusions:
- Labetalol demonstrates significant efficacy in managing both severe and mild to moderate hypertension in a general practice setting.
- The drug is generally well-tolerated, with transient side effects and no observed adverse hematological or biochemical changes.
- Labetalol offers a flexible treatment option due to its consistent efficacy irrespective of dosing frequency.
Abstract:
1 The results of the treatment of 8573 hypertensive patients with labetalol in general practice, for periods between 1 month and 5 yr, are reviewed. 2 The data reviewed were obtained from the published literature together with our own published (Kane et al., 1976; Kane et al., 1979) and more recent (unpublished) work. 3 Between 60% and 80% of severe (diastolic blood pressure greater than 120 mmHg) and previously uncontrolled hypertensives responded satisfactorily to the drug, as did up to 88% of mild to moderate hypertensives. 4 The anti-hypertensive effect of labetalol was not dependent on the frequency of administration, twice and three times daily treatment regimes being equally effective. 5 The withdrawal rate attributable to side-effects was between 6% and 13%. Tiredness, dizziness, headache and upper gastro-intestinal symptoms were the four principal side-effects, but they were usually transient when labetalol treatment was continued. 6 No drug interactions or adverse haematological or biochemical changes were seen.