Medication Summary
Historically, penicillin G in dosages of 10-24 million U/d was the DOC. Recent studies show that protein synthesis inhibitors (eg, clindamycin, chloramphenicol, tetracycline) may be more effective by inhibiting the synthesis of clostridial exotoxins and lessening the local and systemic toxic effects of these proteins.
Antibiotics
Class Summary
These agents inhibit bacterial growth, possibly by blocking dissociation of peptidyl t-RNA from ribosomes, causing RNA-dependent protein synthesis to arrest.
Clindamycin (Cleocin)
May be used for treatment of skin and soft tissue staphylococcal infections. Also effective against aerobic and anaerobic streptococci (except enterococci). Inhibits bacterial growth, possibly by blocking dissociation of peptidyl t-RNA from ribosomes, causing RNA-dependent protein synthesis to arrest.
Penicillin G (Pfizerpen)
Beta-lactam antibiotic that interferes with synthesis of cell wall mucopeptides during active multiplication, resulting in bactericidal activity against susceptible bacteria.
Metronidazole (Flagyl)
Imidazole ring-based antibiotic active against various anaerobic bacteria and protozoa. Used in combination with other antimicrobial agents (except Clostridium difficile enterocolitis).
Tetracycline (Sumycin)
Semisynthetic antibacterial agent derived from Streptomyces cultures. Treats gram-positive and gram-negative organisms and mycoplasmal, chlamydial, and rickettsial infections. Inhibits bacterial protein synthesis by binding with 30S and, possibly, 50S ribosomal subunit(s).
Chloramphenicol (Chloromycetin)
Binds to 50S bacterial-ribosomal subunits and inhibits bacterial growth by inhibiting protein synthesis. Effective against gram-negative and gram-positive bacteria.
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