Journal of Antimicrobial Chemotherapy (1984) 13, 87-92 The pharmacokinetics and tissue penetration of norfloxacin

The pharmacokinetics and cantharides-induced blister fluid levels of norfloxacin were studied after a single 400 mg oral dose. The mean maximum serum level was 1-45 mg/1 and occurred 1-5 h after administration. The serum half-life of norfloxacin was found to be 3-5 h. After 24 h 27 % of the administered dose was recovered in the urine as microbiologically active compound. High urine levels were found. Rapid blister fluid penetration occurred, the maximum level (occur-ring between 2-3 h) was about 1 mg/1. Thereafter the blister fluid level exceeded the serum level, both declining in parallel