Aminoglycosides

ByBrian J. Werth, PharmD, University of Washington School of Pharmacy
Reviewed/Revised May 2024
VIEW PROFESSIONAL VERSION

Aminoglycosides are a class of antibiotics used to treat serious bacterial infections, such as those caused by gram-negative bacteria (especially Pseudomonas aeruginosa).

Aminoglycosides include the following:

  • Amikacin

  • Gentamicin

  • Kanamycin

  • Neomycin

  • Plazomicin

  • Streptomycin

  • Tobramycin

Spectinomycin is chemically related to aminoglycosides and works in a similar way. It is not available in the United States.

Aminoglycosides work by preventing bacteria from producing proteins they need to grow and multiply.

Table

Aminoglycosides are poorly absorbedinto the bloodstream when taken by mouth (orally), so they are usually injected into a vein or sometimes a muscle. Neomycin is available only for topical (applied directly to the skin) or oral use (oral aminoglycosides can be used to decontaminate the digestive tract because they are not absorbed). These antibiotics are usually used with another antibiotic that is effective against many types of bacteria (called a broad-spectrum antibiotic).

All aminoglycosides can damage the ears and kidneys. So doctors monitor the dose carefully and, if possible, often choose a different type of antibiotic.

(See also Overview of Antibiotics.)

Use of Aminoglycosides During Pregnancy and Breastfeeding

If aminoglycosides are taken during pregnancy harmful effects on the fetus (such as hearing loss) are possible, but sometimes the benefits of treatment may outweigh the risks. (See also Safety of Medications During Pregnancy.)

Use of aminoglycosides during breastfeeding is generally considered acceptable. (See also Medication and Substance Use During Breastfeeding.)

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