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amikacin vs gentamicin

Side-by-side comparison of amikacin and gentamicin Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.

Drug Class
amikacin Aminoglycoside Antibiotic
gentamicin Aminoglycoside Antibiotic
Type
amikacin Prescription
gentamicin Prescription
Summary
amikacin

Amikacin is an antibiotic medicine. It fights serious infections caused by certain types of bacteria.

gentamicin

Gentamicin is an antibiotic medicine. It fights serious infections caused by certain bacteria.

What It Treats
amikacin

Amikacin treats serious infections caused by bacteria. This includes infections in the blood, lungs, bones, joints, brain, skin, and abdomen. It can also treat burns, post-surgery infections, and complicated urinary tract infections.

gentamicin

Gentamicin treats serious infections caused by certain bacteria. This includes infections in the blood, brain (meningitis), urinary tract, lungs, stomach area, skin, bone, and soft tissues. It can also treat bacterial infections in newborns.

How It Works
amikacin

Amikacin belongs to a class of drugs called aminoglycosides. It works by stopping the growth of bacteria. This helps your body fight off the infection.

gentamicin

Gentamicin belongs to a class of drugs called aminoglycoside antibiotics. It works by stopping the growth of bacteria. This helps your body fight off the infection.

Common Side Effects
amikacin

No common side effects listed.

gentamicin

No common side effects listed.

FAERS Reports
amikacin
  • Off Label Use 1,908
  • Drug Ineffective 1,673
  • Cough 1,620
  • Dyspnoea 1,556
  • Hospitalisation 1,360
gentamicin
  • Drug Ineffective 1,014
  • Acute Kidney Injury 999
  • Pyrexia 751
  • Off Label Use 677
  • Renal Failure 603
Serious Warnings
amikacin

Amikacin can potentially cause hearing loss and kidney damage. Tell your doctor if you have kidney problems or are taking other medicines that can affect your hearing or kidneys. Your doctor should closely monitor you for hearing and kidney problems during treatment. This drug can also cause muscle weakness or breathing problems, especially if you are also taking anesthesia or certain muscle relaxants.

gentamicin

Gentamicin can potentially damage kidneys and cause nerve damage, including hearing loss. The risk is higher if you have kidney problems, receive high doses, or take it for a long time. Tell your doctor right away if you notice dizziness, ringing in your ears, changes in hearing, or kidney problems.

Pregnancy
amikacin

Tell your doctor if you are pregnant or breastfeeding. Amikacin may harm your unborn baby. It is not known if amikacin passes into breast milk.

gentamicin

Tell your doctor if you are pregnant or breastfeeding. Gentamicin may harm your unborn baby. It is not known if gentamicin passes into breast milk.

Also Compare — Nearby Drugs

How to Read This amikacin vs gentamicin Comparison

amikacin is classified in the Aminoglycoside Antibiotic drug class, while gentamicin sits within the Aminoglycoside Antibiotic class. Because both drugs share the same classification, they are often considered interchangeable in theory — but clinical outcomes rarely track that cleanly. Both drugs are prescription-only, so a licensed provider must authorize use.

Adverse event totals above are pulled from the FDA's Adverse Event Reporting System (FAERS). For these top-ranked reactions alone, amikacin has 8,117 submissions while gentamicin has 4,044. Those figures reflect cumulative reporting volume — not per-patient risk — so older, widely dispensed drugs typically look worse on count alone. No direct interaction between these two drugs is listed in our FDA-derived dataset, though co-prescription still warrants pharmacist review. Serious warnings, pregnancy guidance, and contraindications can differ even when indications overlap.

A table cannot substitute for clinical judgment. Effectiveness, tolerability, drug-drug interactions with your other medications, kidney and liver function, pregnancy status, insurance formulary, and price all feed into a decision that only a licensed prescriber can make responsibly. Data here is sourced from FDA Structured Product Labels (SPL) and FAERS, both of which update as manufacturers and clinicians submit new information. This page is for educational purposes only, is not medical advice, and should not be used to self-switch between amikacin and gentamicin — always consult your physician or pharmacist first.

Important: This comparison is for informational purposes only. Drug effects vary between individuals. Always consult your doctor or pharmacist for personalized medical advice.