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  • Title: Doxazosin GITS trough to peak ratio and 24-hour blood pressure monitoring in the management of hypertension in renal transplant patients.
    Author: Martínez Castelao A, Ibernón M, Sarrias X, Sanz V, Moreso F, Rama I, Grinyó JM.
    Journal: Transplant Proc; 2003 Aug; 35(5):1736-8. PubMed ID: 12962776.
    Abstract:
    UNLABELLED: We have studied 20 patients, 10 male, 10 female, mean age 52.5+/-10.9 years, who received a cadaver kidney transplant between June 1996 and January 1999. The patients presented with mild or moderate high BP and were treated on a maintained immunosuppression with an anti-calcineurin agent and steroids, associated or not to mycophenolate-mofetil. At baseline, a 24-hour ambulatory BP monitoring was performed. General biochemical parameters were determined and doxazosin GITS (Gastro-Intestinal Therapeutic System) in a single dose of 4 mg/d was started. Doxazosin GITS was titrated four weeks after up to 8 mg/d if the BP was greater than 140/90 mm Hg. At week 12, biochemical analysis were repeated as well as the 24-hour BP monitoring and the T/P ratio was calculated. RESULTS: The patients were divided in responders, T/P index >50%, n=10 or not-responders, T/P index <50%, n=10 patients). No differences in systolic BP (SBP), diastolic BP(DBP), plasma creatinine or proteinuria were seen at base-line. DBP was lower in responders than in non-responders (P=ns). Doxazosin doses were 5.5+/-3 mg/d vs 5.8+/-3 and T/P ratio 0.70+/-0.13 vs 0.17+/-0.14, (P=.001). There were no variations in pl. t. cholesterol, triglycerides, glucose or uric acid. CONCLUSIONS: Treatment was safe and efficient, not increasing metabolic adverse effects. Doxazosin GITS is a safe agent which can reduce cardiovascular risk. In our patients, the good T/P ratio has been associated with a best diastolic BP control. This good profile should be taken into account for 24-hour BP control in hypertensive renal transplant patients.
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