Ciprofloxacin extended release: in the treatment of urinary tract infections and uncomplicated pyelonephritis.

Ciprofloxacin extended release (XR) is a new oral formulation of a fluoroquinolone that allows once-daily administration while maintaining therapeutic serum levels of the drug. The maximum plasma concentrations (Cmax) of once-daily ciprofloxacin XR 500 mg was higher than that of twice-daily ciprofloxacin immediate release 250 mg and the Cmax of once-daily ciproflocaxin XR 1000 mg was higher than that of twice-daily ciprofloxacin 500 mg. No accumulation of ciprofloxacin XR at steady state was observed in healthy men and all other pharmacokinetic parameters were similar to those of the immediate-release formulation. In patients with uncomplicated urinary tract infection (UTI), bacteriological eradication rates were similar in recipients of ciprofloxacin XR and immediate-release ciprofloxacin at the test-of-cure (TOC) visit, as were rates of persistence or new infection. Clinical cure rates were also similar in the two treatment groups. Bacteriological eradication occurred in 89% of ciprofloxacin XR and 85% of immediate-release ciprofloxacin recipients with complicated UTIs or acute uncomplicated pyelonephritis at the TOC visit. Clinical cure rates were also similar in the two treatment groups. black triangle Ciprofloxacin XR was generally well tolerated in patients with uncomplicated or complicated UTIs or acute uncomplicated pyelonephritis and showed similar tolerability to that of the immediate-release formulation.