Moxifloxacin Dosing in Severe CKD with Active TB

Key Dosing Principles

The American Thoracic Society, Centers for Disease Control and Prevention, European Respiratory Society, and Infectious Diseases Society of America recommend that moxifloxacin should be dosed at 400 mg once daily without any adjustment for renal function in patients with severe chronic kidney disease and active tuberculosis 1
The FDA drug label is not cited here as the relevant information is not provided, however, the 2019 ATS/CDC/ERS/IDSA guidelines confirm that moxifloxacin requires "no change needed" for reduced renal function 2, 3

The Centers for Disease Control and Prevention recommends that levofloxacin, which undergoes 80% renal clearance, requires dose adjustment to 750-1000 mg three times weekly when creatinine clearance falls below 50 mL/min, in contrast to moxifloxacin which does not require dose adjustment 4, 1

The American Thoracic Society, Centers for Disease Control and Prevention, European Respiratory Society, and Infectious Diseases Society of America recommend administering 400 mg once daily orally or intravenously 2, 3

The American Thoracic Society, Centers for Disease Control and Prevention, European Respiratory Society, and Infectious Diseases Society of America suggest that doses of 600-800 mg daily may be used when isolates show resistance to ofloxacin or when minimum inhibitory concentrations suggest higher doses may overcome resistance 2
Research suggests that 800 mg daily may provide superior resistance suppression, but long-term safety data at doses above 400 mg/day are limited 2
For standard drug-susceptible TB in a patient with severe CKD, the American Thoracic Society, Centers for Disease Control and Prevention, European Respiratory Society, and Infectious Diseases Society of America recommend maintaining the 400 mg daily dose unless drug susceptibility testing indicates resistance requiring higher doses 2, 3

The Centers for Disease Control and Prevention recommends that moxifloxacin should not be administered within 2 hours of antacids or medications containing divalent cations (calcium, magnesium, iron, aluminum), as these significantly reduce bioavailability 4

The American Thoracic Society, Centers for Disease Control and Prevention, Infectious Diseases Society of America recommend that if the patient requires hemodialysis or peritoneal dialysis, moxifloxacin can be given at any time as it is not significantly removed by dialysis, unlike other TB drugs like pyrazinamide and ethambutol, which should be given post-dialysis 1

Moxifloxacin maintains its standard dosing in patients with renal impairment, unlike other antibiotics such as aminoglycosides or certain fluoroquinolones like levofloxacin, according to the American College of Physicians 5, 6
In contrast to moxifloxacin, levofloxacin requires dose adjustment in renal impairment, with recommendations for 750-1000 mg three times weekly when GFR is <30 mL/min, as suggested by the Infectious Diseases Society of America 5, 7

Studies directly comparing moxifloxacin and levofloxacin in patients with acute renal failure found that while levofloxacin required dosage reduction, moxifloxacin could be administered at standard doses, although the specific study details are not provided 5