Ciprofloxacin + Gentamicin

The drug combination "ciprofloxacin + gentamicin" is an antibiotic combination therapy used to treat various bacterial infections. ## Composition and Classification This is a combination of two distinct antibiotics: 1. **Ciprofloxacin**: A fluoroquinolone antibiotic that inhibits bacterial DNA replication by targeting DNA gyrase and topoisomerase IV. 2. **Gentamicin**: An aminoglycoside antibiotic that inhibits bacterial protein synthesis by binding to the 30S ribosomal subunit. ## Therapeutic Applications The ciprofloxacin + gentamicin combination has been studied for and used in various infections, including: * Plague caused by Yersinia pestis * Salmonella enterica serovar Typhi infections * Pseudomonas aeruginosa biofilm-related infections * Staphylococcus aureus infections, particularly those caused by beta-lactamase-producing strains ## Efficacy and Synergistic Effects Research has shown varying degrees of interaction between ciprofloxacin and gentamicin: * In murine plague models, the combination was as effective as ciprofloxacin alone, but regimens containing ciprofloxacin (either alone or with gentamicin) reduced bacterial load in draining lymph nodes more efficiently than gentamicin alone. * Against Salmonella enterica serovar Typhi, the combination demonstrated synergistic effects with fractional inhibitory concentration (FIC) index values ranging from 0.121-0.216, indicating strong synergism. * Against Staphylococcus aureus, isobolographic analysis showed that certain ratios of ciprofloxacin-gentamicin (0.5:0.5, 0.8:0.2, 0.2:0.8, and 0.9:0.1) produced synergistic antibacterial effects, while other ratios showed additive or even antagonistic effects. * For Pseudomonas aeruginosa biofilms, studies have shown synergistic effects when gentamicin is combined with other antibiotics, though the specific combination with ciprofloxacin showed varying results depending on the study. ## Administration Both antibiotics can be administered through various routes: * Ciprofloxacin: Available in oral, intravenous, intratympanic, ophthalmic, and otic formulations. * Gentamicin: Typically administered via injection into a blood vessel or muscle, available in various dosage strengths. ## Safety Considerations According to Drugs.com, no specific interactions were found between ciprofloxacin and gentamicin, though this doesn't necessarily mean no interactions exist. Healthcare provider consultation is always recommended. The combination therapy should be used with caution and under medical supervision due to the potential for side effects associated with each individual antibiotic, including nephrotoxicity and ototoxicity with gentamicin, and tendon damage, peripheral neuropathy, and CNS effects with ciprofloxacin.

Other names

ciprofloxacin plus gentamicinaugmented ciprofloxacin plus gentamicinciprofloxacin + gentamycine-Mansoura University-infection