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  • Title: The effects of terazosin and methyclothiazide on blood pressure and serum lipids.
    Author: Luther RR, Glassman HN, Estep CB, Maurath CJ, Jordan DC.
    Journal: Am Heart J; 1989 Apr; 117(4):842-7. PubMed ID: 2564723.
    Abstract:
    This study compared the antihypertensive efficacy and the effects on serum lipids of terazosin, a new selective alpha 1-adrenergic antagonist, of methyclothiazide (MCTZ), and of the two drugs used as combination therapy. Adult patients with supine diastolic blood pressure ranging from 95 to 120 mm Hg were eligible to enter this double-blind, randomized, parallel-group study. Analyses of the blood pressure data from the 194 evaluable patients revealed that all three treatments produced significant (p less than 0.001) reductions in supine and standing systolic and diastolic blood pressures from baseline values. Moreover, combination therapy resulted in significantly greater mean blood pressure reductions than were observed with either drug used as monotherapy. In the group receiving terazosin monotherapy, the total serum cholesterol level, low-density lipoprotein plus very-low-density lipoprotein cholesterol fraction, and triglyceride level fell significantly (median changes of 3.7%, 5.0%, and 16.3%, respectively, p less than 0.05). However, in the group receiving MCTZ monotherapy, the total serum cholesterol level, low-density lipoprotein plus very-low-density lipoprotein cholesterol fraction, and triglyceride level increased significantly (4.7%, 7.1%, and 12.5%, respectively, p less than 0.001). In contrast, no significant changes from baseline values were observed for any lipid variable in the group receiving terazosin/MCTZ combination therapy. We conclude that terazosin is effective antihypertensive therapy that has a potentially beneficial effect on the serum lipid profile when used as monotherapy and that it counteracts the negative impact of MCTZ monotherapy on the serum lipid profile when used concurrently with this thiazide diuretic.
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