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  • Title: A multicentre multidose study of the efficacy and safety of spirapril in mild-to-moderate essential hypertension. UK Study Group of Spirapril in Hypertension.
    Author: Fairhurst GJ.
    Journal: Blood Press Suppl; 1994; 2():77-80. PubMed ID: 8061852.
    Abstract:
    This was a randomized double-blind parallel-group study of 283 patients who had mild-to-moderate [diastolic blood pressure (DBP) > 100 mmHg and < or = 115 mmHg] hypertension. After a 3 (or 4)-week placebo wash-out period followed by 6 weeks of active treatment with spirapril at either 3, 6, 12 or 24 mg once daily (or placebo), DBP decreased by approximately 10 mmHg in the (pooled) spirapril-treated patients compared with approximately 5 mmHg with placebo. There were statistically significant differences between all active-treatment groups (except the 24-mg dose group) and placebo, but not among the spirapril groups at the end of the +24-hour dosing interval. Reported adverse events were mostly not study drug-related and were similar to those with placebo except for headache, which was more frequent with spirapril than placebo (5.8% vs 1.7%, respectively). Similarly, the number and severity of the changes in laboratory variables did not differ between placebo vs spirapril, and none of these changes were dose-related. In conclusion, the studied dosages of spirapril were equally effective in reducing DBP, and the overall good decrease in blood pressure at the end of the dosing interval indicates that once-daily administration is effective in patients with mild-to-moderate hypertension.
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