Penetration of norfloxacin into human prostatic tissue following single-dose oral administration.

Concomitant concentrations of norfloxacin in serum, urine and prostatic tissue were determined in 12 patients following a single oral dose of 400 mg. Tissue levels ranged from 0.3 to 1.73 mg/kg, and therapeutic concentrations were demonstrable for as long as 8 h following dosage. The mean ratio of tissue to serum concentration was 1.01 +/- (SE) 0.13.