Abstract
Objective: The management of obese hypertensive subjects may require the administration of anti-obesity and antihypertensive drugs. Sibutramine use has raised concerns regarding a potential increase in subjects' blood pressure and heart rate. The primary end-points of this study were an evaluation of the effect of sibutramine together with a verapamil sustained release/trandolapril combination tablet versus verapamil sustained release/trandolapril alone on the blood pressure and heart rate in obese hypertensive patients. Research design/methods: Patients received a low-fat low-calorie diet and were randomly allocated to open-label verapamil sustained release/trandolapril 180/2 mg (n = 26) or sibutramine 10 mg together with verapamil sustained release/trandolapril 180/2 mg (n = 28) daily for 6 months. Results: Significant reductions in the subjects' systolic blood pressure and diastolic blood pressure were observed in both groups (p < 0.01 versus baseline). At 6 months a greater fall in blood pressure was observed in the sibutramine/verapamil sustained release/trandolapril group compared with the verapamil sustained release/trandolapril group (systolic blood pressure 21.9 ± 8.1 versus 15.9 ± 12.3 mmHg and diastolic blood pressure 15.7 ± 8.1 versus 9.1 ± 9.9 mmHg) but this was only significant (p = 0.03) for diastolic blood pressure. The subjects' heart rate did not change significantly in any group. No significant sibutramine-associated attenuation of blood pressure reduction was observed during the study. The sibutramine/verapamil sustained release/trandolapril treatment resulted in significantly greater improvement in the subjects' anthropometric variables, homeostasis model assessment and lipid profiles compared with verapamil sustained release/trandolapril administration. The subjects' small dense low-density lipoprotein cholesterol, high-sensitivity C-reactive protein and visfatin plasma levels were only measured in the sibutramine/verapamil sustained release/trandolapril group (all decreased by p < 0.05 versus baseline). Conclusions: The sibutramine/verapamil sustained release/trandolapril combination in obese hypertensive patients significantly reduced their blood pressure and improved their anthropometric and metabolic variables without affecting the heart rate.
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