Authors: Shinichi Takatsuki Michelle Calderbank David Dunbar Ivy
Publish Date: 2012/03/09
Volume: 33, Issue: 5, Pages: 683-688
Abstract
This study aimed to investigate the safety tolerability and effects of tadalafil on children with pulmonary arterial hypertension PAH after transition from sildenafil or after tadalafil received as initial therapy A total of 33 pediatric patients with PAH were retrospectively evaluated Of the 33 patients 29 were switched from sildenafil to tadalafil The main reason for the change from sildenafil was oncedaily dosing The average dose of sildenafil was 34 ± 11 mg/kg/day and that of tadalafil was 10 ± 04 mg/kg/day For 14 of the 29 patients undergoing repeat catheterization statistically significant improvements were observed after transition from sildenafil to tadalafil in terms of mean pulmonary arterial pressure 532 ± 183 vs 474 ± 137 mmHg p 005 and pulmonary vascular resistance index 122 ± 70 vs 106 ± 72 Units/m2 p 005 Clinical improvement was noted for four patients treated with tadalafil as initial therapy The side effect profiles were similar for the patients who had transitioned from sildenafil to tadalafil including headache nausea myalgia nasal congestion flushing and allergic reaction Two patients discontinued tadalafil due to migraine or allergic reaction One patient receiving sildenafil had no breakthrough syncope after transition to tadalafil Tadalafil can be safely used for pediatric patients with PAH and may prevent disease progression
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