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  • Title: Comparison of the efficacy and tolerability of an angiotensin converting enzyme inhibitor (lisinopril) versus a calcium channel antagonist (diltiazem SR) in the treatment of moderate to severe hypertension.
    Author: Weir MR, Fagan T, Chrysant S, Flamenbaum W, Kaihlanen PM, Lueg M, Anzalone D.
    Journal: J Hum Hypertens; 1994 Jul; 8(7):531-7. PubMed ID: 7932518.
    Abstract:
    One hundred and ten patients (mean age 50.6 years) with moderate to severe essential hypertension (DBP between 105 and 116 mmHg) were randomised to eight weeks of double-blind treatment with lisinopril (n = 56) or diltiazem SR (n = 54). Fourteen patients withdrew from therapy; six patients withdrew because of adverse events (lisinopril, n = 3; diltiazem SR, n = 1) and lack of BP control (lisinopril, n = 1; diltiazem SR, n = 1). Both monotherapies were titrated upward (lisinopril 20-40 mg daily, diltiazem SR 120-180 mg twice daily) to achieve an office DBP < 90 mmHg. Hydrochlorothiazide (HCTZ; 25 mg daily) was added to monotherapy after week 4 if patients did not reach the BP goal (i.e. non-responders). After four weeks of therapy, 72% of patients (74 of 103) were nonresponders. At eight weeks of therapy, 66 patients (lisinopril, n = 32; diltiazem SR, n = 34) had received HCTZ. At week 8, 53% of lisinopril and 36% of diltiazem SR patients met the response criteria. Mean office DBP decreased from baseline -18.1 +/- 8.6 mmHg for lisinopril patients and -15.9 +/- 10.1 mmHg for diltiazem SR patients at week 8. Lisinopril was as effective as diltiazem in reducing systolic and diastolic office BP at week 4 (p > 0.1). Likewise, at weeks 4 and 8, no statistically significant differences were detected between treatments (p > 0.05) for systolic and diastolic ambulatory BP averaged over 24 hours. Both treatments were well tolerated and showed important antihypertensive efficacy in patients with moderate to severe BP elevation.
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