Comparative study of the clinical efficacy of two dosing regimens of flutamide

J. B. Thrasher*, J. Deeths, C. Bennety, P. Iyer, M. K. Dineen, S. Zhai, W. D. Figg, D. G. McLeod, D. Bostwick, L. Klotz, J. Fourcroy, N. Stone

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


Purpose: We performed a randomized trial to compare the efficacy and toxicity of a new dose of flutamide (500 mg QD) with the currently recommended dose (250 mg q8h) in the treatment of advanced proshate cancer. The primary endpoints were percent of patients having normalization of prostate specific antigen (PSA), time to normalization, and percent change from baseline. Secondary endpoints were quality of life and toxicity. Patients: Altogether, 440 men aged 46 to 94 years (mean 71 years) with confirmed stage M1 disease, documented PSA rise >0.2 ng/mL, ECOG status 0 to 2, no second neoplasm, no liver function tests ≥1.5-fold normal values, and no previous treatment for metastatic disease were entered in the trial. Results: The PSA normalized by week 12 in 71% of the patients receiving 500-mg dose and 75% of those receiving the standard dose. The percent change in PSA was 89% and 96%, respectively. The treatment groups were not significantly different with respect to the incidence of adverse events: 71% v 68% in the 500-mg and 250-mg arms, respectively (P = 0.337). Conclusions: When combined with castration, 500 mg of flutamide appears to be equally effective in lowering serum PSA and is not significantly more toxic than conventional dosing. The use of 500 mg QD instead of the standard 250 mg q8h would result in a cost savings of 30%.

Original languageEnglish
Pages (from-to)259-263+265
JournalMolecular Urology
Issue number3
StatePublished - 2000
Externally publishedYes


Dive into the research topics of 'Comparative study of the clinical efficacy of two dosing regimens of flutamide'. Together they form a unique fingerprint.

Cite this