Successful acute and long-term treatment of renin-induced hypertension in two infants with captopril

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Abstract
Captopril, an orally active inhibitor of angiotensin-converting-enzyme, offers a new approach in the treatment of renin-induced hypertension, which is refractory to conventional drugs. A 4 months old infant developed after nephrectomy again hypertension which was probably renin-induced. BP did not respond to high doses of methyl-dopa, clonidine, hydralazine, and furosemide. An acute BP response to captopril was seen at a daily dose of 150 mg. During long-term treatment, 75 mg captopril and 12.5 mg hydrochlorothiazide resulted in normalization of BP. In a second child with renin-induced hypertension since the firth month of life, treatment wiht hydralazine, clonidine and hydrochlorothiazide was in part effective, but failure to thrive was progressive. Captopril treatment was started at the age of 20 months. BP was lowered at a daily dose of 75 mg and normalized during long-term therapy with 50 mg. Side effects were not seen.