Antibiotic Amoxicillin Ciprofloxacin Trimethoprim-SMX Nitrofurantoin Levofloxacin Doxycycline Azithromycin CrCl (mL/min) Age (years) Standard Dose (mg) Standard Frequency OD (once daily) BD (twice daily) TDS (three times daily) QDS (four times daily) Calculate Adjusted Dose