Meropenem Dosing Regimen for Urinary Tract Infections

Standard Dosing for UTIs

For standard complicated UTIs, meropenem 1 gram IV every 8 hours is the recommended dosing regimen 1, 2
Treatment duration should typically be 5-7 days for complicated UTIs 1, 2
Extended infusion of meropenem over 3 hours is suggested if the pathogen's meropenem MIC is ≥8 mg/L 2

Definitive treatment duration should be individualized according to infection site complexity, source control effectiveness, underlying comorbidities, and initial response to therapy 1, 2

Meropenem/vaborbactam 4 g IV q8h (2C level evidence) is an alternative option for carbapenem-resistant organisms in UTIs 3, 2
Ceftazidime/avibactam 2.5 g IV q8h (2D level evidence) is an alternative option for carbapenem-resistant organisms in UTIs 2, 4
Imipenem/cilastatin/relebactam 1.25 g IV q6h (2C level evidence) is an alternative option for carbapenem-resistant organisms in UTIs 2
Gentamicin 5-7 mg/kg/day IV daily (2D level evidence) is an alternative option for susceptible organisms 2
Amikacin 15 mg/kg/day IV daily (2D level evidence) is an alternative option for susceptible organisms 2

For severe infections with resistant organisms, combination therapy may be considered based on susceptibility testing 2

For carbapenem-resistant Enterobacterales (CRE) causing complicated UTIs, meropenem-vaborbactam 4 g IV every 8 hours is recommended (weak recommendation, low quality of evidence) 5, 6
Imipenem-cilastatin-relebactam 1.25 g IV every 6 hours is an alternative option for CRE UTIs (weak recommendation, low quality of evidence) 5, 6

For CRE UTIs, ceftazidime-avibactam 2.5 g IV every 8 hours is recommended as an alternative (weak recommendation, very low quality of evidence) 5, 6
Single-dose aminoglycosides may be effective for simple cystitis due to CRE (weak recommendation, very low quality of evidence) 5, 7
Plazomicin 15 mg/kg IV every 12 hours is recommended for complicated UTIs due to CRE (weak recommendation, very low quality of evidence) 5, 7