PEDIATRICS Vol. 78 No. 5 November 1986, pp. 861-865
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Minoxidil for Control of Acute Blood Pressure Elevation in Chronically Hypertensive Children

C. Frederic Strife MD1, Monica Quinlan RN, BSN1, F. Bryson Waldo MD1, Cheryl J. Fryer MD1, Elizabeth C. Jackson MD1, Thomas R. Welch MD1, Paul T. McEnery MD1, and Clark D. West MD1

1 From the Children's Hospital Research Foundation and the Department of Pediatrics, University of Cincinnati School of Medicine, Cincinnati

Twenty-three episodes of acute elevation of BP related to renal disease in 13 chronically hypertensive children 2 to 18 years of age were treated with a single oral dose of minoxidil. All except one patient were receiving a diuretic and all but one a beta-blocking agent at the time of minoxidil treatment. The goal of lowering BP to or below the 95th percentile for age within four hours of minoxidil administration was achieved in 14 of 23 treatment episodes. The goal was achieved in nine of 11 (82%) when the dose of minoxidil was ge0.2 mg/kg and in five of 12 (42%) when the dose was <0.2 mg/kg (P < .05). In patients treated with ge0.2 mg/kg of minoxidil, mean systolic and diastolic BP decreased significantly from pretreatment values within one hour. In patients receiving <0.2 mg/kg, mean systolic BP was never significantly reduced and mean diastolic BP did not change significantly for two hours. Adverse effects were minimal. The results indicate that minoxidil in a dose of 0.2 mg/kg in combination with a diuretic and beta-blocking agent will lower BP to safe levels in most patients with severe hypertension related to renal disease within four hours with minimal side effects.

Key Words: minoxidil • hypertension • blood pressure

Submitted on January 6, 1986
Accepted on March 28, 1986