Antimicrobial Therapy Guidelines

Introduction to Antimicrobial Therapy

The American College of Physicians recommends clindamycin as a valuable option for patients with kidney disease who require antimicrobial therapy, as it does not require dose adjustment for renal impairment 1
The Infectious Diseases Society of America provides guidelines for antimicrobial therapy, including recommendations for various antibiotic classes and patient populations 2

Clindamycin should be administered at 600 mg IV every 8 hours or 300-450 mg PO three times daily, according to the Infectious Diseases Society of America 3
For CNS infections caused by MRSA, the Infectious Diseases Society of America recommends 600 mg IV/PO twice daily 1
Piperacillin-tazobactam should be administered at 3.375 g IV every 6 hours, which can be increased to 4.5 g every 6 hours for Pseudomonas infections, according to the Infectious Diseases Society of America 2
Meropenem should be administered at 1 g IV every 8 hours, as recommended by the Infectious Diseases Society of America 2
Cefuroxime should be administered at 1.5 g IV every 8 hours or 500 mg PO twice daily, based on guidelines from the Infectious Diseases Society of America and the American Academy of Allergy, Asthma, and Immunology 2, 4
Vancomycin should be administered at 15-20 mg/kg IV every 8-12 hours, with serum level monitoring, as recommended by the Infectious Diseases Society of America 2
Metronidazole should be administered at 500 mg IV/PO every 8-12 hours, as recommended by the Infectious Diseases Society of America 2
Aminoglycosides (e.g., gentamicin) should be administered at 5-7 mg/kg IV once daily, with drug level monitoring, based on guidelines from the Infectious Diseases Society of America 2
Levofloxacin should be administered at 750 mg IV/PO every 24 hours, as recommended by the Infectious Diseases Society of America 2

The National Kidney Foundation notes that clindamycin can be safely used in patients on hemodialysis without special timing considerations 1
The American Association for the Study of Liver Diseases recommends monitoring liver function in patients with pre-existing liver disease due to the rare risk of hepatotoxicity 1
Dose adjustments are required for many antibiotics in patients with renal impairment, particularly aminoglycosides, vancomycin, and some β-lactams, as recommended by the Infectious Diseases Society of America 2

The American College of Gastroenterology warns that clindamycin commonly causes nausea, vomiting, and diarrhea, and may increase the risk of Clostridioides difficile infection 1
The American Academy of Allergy, Asthma, and Immunology recommends avoiding clindamycin in patients with a history of hypersensitivity to clindamycin or lincomycin 1
Adverse effects, such as gastrointestinal symptoms, allergic reactions, and organ toxicity, should be monitored, and therapy should be adjusted based on culture and susceptibility results when available, according to the Infectious Diseases Society of America 2

Antimicrobial therapy should be limited to 4-7 days unless source control is difficult to achieve, according to the Infectious Diseases Society of America 2
The duration of antibiotic therapy may need to be extended for complicated infections, with 10-14 days or longer recommended based on clinical response, as suggested by the Infectious Diseases Society of America 5
Clinical response should be assessed within 48-72 hours of initiating therapy, and drug levels should be monitored for vancomycin and aminoglycosides, as recommended by the Infectious Diseases Society of America 2

Local resistance patterns should guide empiric therapy choices, and local antibiograms should be consulted, according to the Infectious Diseases Society of America 2
For MSSA infections, dicloxacillin 500 mg PO four times daily or cephalexin 500 mg PO four times daily is recommended, according to the Infectious Diseases Society of America 3
For MRSA infections, vancomycin 30 mg/kg/day IV in 2 divided doses or linezolid 600 mg IV/PO every 12 hours is recommended, based on guidelines from the Infectious Diseases Society of America 3
For severe disease, clindamycin 300-600 mg IV every 6 hours (or 600 mg PO every 8 hours) plus quinine 650 mg PO every 6-8 hours is recommended, as suggested by the Infectious Diseases Society of America 5