Gentamicin — Uses, Dosage, Side Effects & Safety

Drug class: Aminoglycoside Antibiotic

Overview

Gentamicin is a prescription antibiotic used to treat serious bacterial infections, especially those caused by Gram-negative bacteria. It is commonly used for infections of the blood, abdomen, urinary tract, skin, bones, and joints, as well as certain eye infections. Gentamicin works by stopping the growth of bacteria. It does this by interfering with the bacteria’s ability to make proteins, which are essential for their survival. Gentamicin is usually given by injection in a hospital setting, but it is also available as eye drops, ointments, and topical creams for localized infections. It is important to use gentamicin exactly as prescribed and to complete the full course, even if you start to feel better. Patients should be aware that gentamicin can cause serious side effects, including kidney and hearing problems, so regular monitoring is necessary during treatment.

Therapeutic uses

• Severe bacterial infections (e.g., sepsis)
• Complicated urinary tract infections
• Hospital-acquired pneumonia
• Meningitis (in combination with other antibiotics)
• Endocarditis (in combination with other antibiotics)

Common side effects

• Nephrotoxicity (kidney damage)
• Ototoxicity (hearing loss or balance problems)
• Neuromuscular blockade (muscle weakness)
• Rash
• Nausea
• Vomiting
• Diarrhea

Frequently Asked Questions about Gentamicin

What infections does gentamicin treat?

Gentamicin is used to treat serious bacterial infections, including those of the blood (sepsis), abdomen, urinary tract, skin, bones, joints, and certain eye infections. It is especially effective against Gram-negative bacteria.

Can gentamicin cause hearing loss?

Yes, gentamicin can cause hearing loss (ototoxicity), especially with high doses, prolonged use, or in patients with kidney problems. Regular hearing tests are recommended during treatment.

Is gentamicin safe during pregnancy?

Gentamicin should only be used during pregnancy if the benefits outweigh the risks, as it may harm the developing baby. Discuss with your doctor if you are pregnant or planning to become pregnant.

How is gentamicin administered?

Gentamicin is usually given as an injection into a vein or muscle by a healthcare professional. It is also available as eye drops, ointment, or topical cream for localized infections.

What should I do if I miss a dose?

Contact your healthcare provider for instructions. For topical or eye forms, apply as soon as you remember, but skip if it is almost time for the next dose. Do not double up.

What are the signs of gentamicin toxicity?

Signs include hearing loss, ringing in the ears, dizziness, decreased urination, muscle weakness, and confusion. Seek medical attention if you experience any of these symptoms.

Can I use gentamicin with other antibiotics?

Gentamicin is sometimes used with other antibiotics for severe infections. However, some combinations can increase the risk of side effects, so always follow your doctor’s instructions.

Educational information only. Always consult a qualified healthcare professional before starting, stopping, or changing any medication.