Dutasteride lowers the incidence of prostate cancer, but not high-grade tumors, according to a New England Journal of Medicine study.
In a double-blind study designed by dutasteride's manufacturer, some 6700 high-risk men underwent randomization to either daily dutasteride or placebo. At entry, subjects were 50 to 75 years old, had PSA levels between 2.5 and 10 ng/mL, and had had a negative biopsy.
During 4 years' follow-up, the incidence of biopsy-detected cancer was lower in the treatment group than in controls (20% vs. 25%). The number of high-grade tumors, however, was significantly higher in the treatment group during the last 2 years of follow-up.
An editorialist concludes that the 5-alpha-reductase inhibitors like dutasteride "do not prevent ... but merely temporarily shrink tumors that have a low potential for being lethal." He adds that, because the drugs suppress PSA levels, "men may have a false sense of security," thus delaying diagnosis.
No comments:
Post a Comment