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.
D000328:Adult; D000368:Aged; D001794:Blood Pressure / Q000187:drug effects; D001835:Body Weight / Q000187:drug effects; D002986:Clinical Trials as Topic; D003692:Delayed-Action Preparations; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D006973:Hypertension / Q000188:drug therapy* / Q000503:physiopathology; D008297:Male; D008790:Metoprolol / Q000008:administration & dosage*; D008875:Middle Aged; D005082:Physical Exertion; D011412:Propanolamines / Q000008:administration & dosage*
D003692:Delayed-Action Preparations; D011412:Propanolamines; D008790:Metoprolol