Amoxicillin Dosing for Uncomplicated UTI

Introduction to Amoxicillin Use

• The American College of Physicians recommends amoxicillin 500 mg orally every 8 hours for 7 days for uncomplicated UTI in adults, though it is not a first-line agent due to high E. coli resistance rates 1

When Amoxicillin is Appropriate

• Amoxicillin 500 mg orally every 8 hours is first-line therapy for uncomplicated pansensitive Enterococcus faecalis UTIs, achieving high clinical and microbiological eradication rates 1
• Treatment duration for Enterococcus faecalis UTIs is 7 days 1

Pediatric Dosing

• The American Academy of Pediatrics recommends amoxicillin-clavulanate 20-40 mg/kg per day divided into 3 doses for pediatric patients aged 2-24 months 2
• Treatment duration for pediatric patients is 7-14 days 2
• Maximum dose for pediatric patients is 4000 mg/day 3

Preferred First-Line Agents for Typical UTIs

• The European Association of Urology recommends nitrofurantoin, trimethoprim-sulfamethoxazole, or fosfomycin as superior choices for empiric therapy of uncomplicated cystitis caused by E. coli 4, 1
• Amoxicillin should be reserved for culture-proven susceptible organisms, particularly Enterococcus species 1

Important Considerations

• The Infectious Diseases Society of America recommends obtaining culture and susceptibility testing before using amoxicillin for UTI 1