Gentamicin antibiotics?

Gentamicin is an antibiotic in the aminoglycoside class. It’s used mainly for serious infections caused by certain bacteria, usually in a hospital setting. It’s not effective for many common outpatient infections.

Key points:
- How it works: It binds to the bacterial 30S ribosome, inhibiting protein synthesis.
- Spectrum: Good activity against many Gram-negative bacteria (e.g., certain Pseudomonas, Enterobacteriaceae) and some Gram-positive bacteria when used with a beta-lactam antibiotic. Not active against anaerobes.
- Common uses: Severe sepsis, hospital-acquired pneumonia, complicated urinary tract infections, intra-abdominal infections, gynecologic infections, bone/joint infections, and endocarditis in some cases (typically in combination with a beta-lactam). Topically, it’s used as an eye or ear preparation.
- How it’s given: Usually by injection (IV or IM) for systemic infections. Topical formulations exist for eye and ear infections.
- Monitoring and dosing: Has a narrow therapeutic index, so blood levels (peaks and troughs) and kidney function are monitored to balance effectiveness with toxicity. Dosing is individualized and often adjusted for kidney function.
- Side effects and risks: Nephrotoxicity (kidney injury) and ototoxicity (hearing or balance problems) are major concerns. Rarely, neuromuscular blockade or allergic reactions. Use with caution in pregnancy unless clearly needed.
- Interactions and cautions: Can interact with other nephrotoxic or ototoxic drugs (e.g., NSAIDs, loop diuretics, amphotericin B). Avoid or monitor carefully in people with kidney disease.
- Resistance: Some bacteria may be resistant; sometimes gentamicin is used in combination with another antibiotic to improve effect (synergy).

If you have a specific infection, patient population (e.g., pregnancy, kidney disease), or want to know about topical forms vs. injections, tell me and I can tailor the info.