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  • Title: Usefulness of naftopidil for dysuria in benign prostatic hyperplasia and its optimal dose--comparison between 75 and 50 mg.
    Author: Oh-oka H.
    Journal: Urol Int; 2009; 82(2):136-42. PubMed ID: 19321997.
    Abstract:
    BACKGROUND/OBJECTIVES: The clinical usefulness and optimal dose of naftopidil were evaluated and discussed in 100 patients with benign prostatic hyperplasia without urinary retention. METHODS: Naftopidil was administered once in the morning in a dose of 75 mg for 6 weeks; following washout for 1 week, a reduced dose of 50 mg was administered for another 6 weeks. Subjective and objective symptoms were clinically evaluated. RESULTS: Significant improvements were observed in nocturia, IPSS, QOL index, Qmax, Qave, and % postvoid residual urine volume after administration of 75 mg as well as 50 mg. Comparison of the results obtained after administration of 75 and 50 mg revealed improvement only in bladder compliance. Among the items of the IPSS, 'nocturia', 'less than two hours urination', 'weak urinary stream' and 'sensation of not emptying bladder' improved, after administration of 75 as well as 50 mg. The bladder compliance aggravated to 13.6, from 22.1 ml/cm H(2)O after administration of 50 mg. CONCLUSIONS: Naftopidil could have superior effects in benign prostatic hyperplasia patients whose complaints are storage and voiding symptoms, especially nocturia of three times or more, as well as in patients with low compliance bladder and detrusor overactivity. The recommended dose seems to be 50 mg.
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