Biomedical subjects
C W Harvard
Publications and source records attributed to C W Harvard.
A double-blind crossover comparative study of the efficacy of single daily doses of conventional and slow-release metoprolol.
The antihypertensive effect of slow-release metoprolol was studied in 50 patients suffering from mild to moderate essential hypertension. In a double-blind crossover study, the effect of slow-release metoprolol was compared with conventional metoprolol for efficacy and tolerability in 40 patients. After a 2-week period on placebo, patients received either 200 mg slow-release metoprolol once daily or 200 mg conventional metoprolol once daily for 6 weeks before crossing over to the alternative dosage form for a further 6 weeks. The results showed that both slow-release and conventional metoprolol were equipotent and reduced significantly the pulse rate and also the supine, sitting and standing systolic and diastolic blood pressures. Slow-release metoprolol also reduced the exercise blood pressure in 10 patients following 2-weeks' administration of 200 mg daily in a single dose. Good patient compliance with the medication was observed. No adverse effect attributable to slow-release metoprolol or conventional metoprolol was detected throughout the study.
Assessment of the efficacy and acceptability of an acebutolol/hydrochlorothiazide combination in the treatment of mild to moderate essential hypertension.
The efficacy and acceptability of single daily doses of a fixed combination of 400 mg acebutolol and 25 mg hydrochlorothiazide were assessed in an open study of 30 patients suffering from mild to moderate essential hypertension. Results from 20 patients who completed the 6-months' active drug period, and 9 patients whose treatment was terminated at various times before the end of this period, indicated significant reduction in the systolic and diastolic blood pressure in supine, sitting and standing positions. This effect was apparent from the first month on drug therapy and was maintained throughout the 6-month trial. In no patient was withdrawal from this study attributable to side-effects of the drug. Results indicated good control of hypertension by a single dose of the combined drugs and good patient compliance was observed during the study. Potassium loss, frequently experienced during hydrochlorothiazide treatment, was not observed in the presence of acebutolol.
Drug-induced disease.
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