Treatment of elderly hypertensive patients with a delayed-release verapamil formulation in a community-based trial.

Abstract

This report of a practice-based clinical trial describes an open-label, multicenter dose-titration study of an elderly (age >or=65 years) subset of patients (N=628) with systolic blood pressures between 140 and 179 mm Hg or diastolic blood pressures between 90 and 109 mm Hg, to assess the effects of the Chronotherapeutic Oral Drug Absorption System (CODAS) formulation of verapamil hydrochloride. After starting 200 mg/d at bedtime, dosing was titrated to a maximum of 400 mg/d at 4-week intervals to achieve a target blood pressure of <140/<90 mm Hg using morning blood pressure measurements. Target blood pressure was reached in 57.1% of the elderly patients with CODAS verapamil monotherapy. A diastolic response (<90 mm Hg or a 10 mm Hg reduction from baseline) was achieved in 89.5% of these subjects, and a systolic blood pressure response (<140 mm Hg or 10% reduction from baseline) was attained in 75.5%. The percentages of patients achieving target blood pressure or the diastolic and systolic blood pressure responses were comparable to those previously reported for younger patients. It is notable that although 359 of the 628 patients reached control on treatment, 182 of the remaining 269 noncontrolled patients were not titrated to higher doses, indicating that even with a well tolerated drug there may be reluctance among clinicians to increase doses. CODAS verapamil was found to be efficacious and well tolerated among elderly hypertensive patients in this community trial.