👤 By the CinnaRN Clinical Content Team🕐 Updated 2026-08-23🏷️ Pharmacological Therapies🔖 Free to read, print, and share
Also known as: aminoglycosides · gentamicin · tobramycin · amikacin · mycin antibiotics · strong IV antibiotics
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Use this quick-reference guide to spot, treat, and prevent Aminoglycosides on the NCLEX. Keep it handy during review and on exam day!
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📒 The 1-minute cheat sheet
🧪 Meds
Gentamicin, tobramycin, amikacin
Tx serious gram-neg infections
🩺 Signs
Ototoxicity: tinnitus, hearing loss
Nephrotoxicity: ↑ creatinine, ↓ UO
🧪 Labs
Draw peak + trough levels
Monitor BUN, creatinine, renal fx
🚩 Report
Hearing change → STOP, irreversible
↓ urine output, rising creatinine
📚 Aminoglycosides — full study notes
The cheat sheet above is your quick recall card. These notes go deeper — what it is, what to do first, what must be reported, and what to teach.
Aminoglycosides (gentamicin, tobramycin, amikacin, neomycin) are potent IV antibiotics used for serious gram-negative infections. Their two hallmark toxicities are nephrotoxicity (kidney damage) and ototoxicity (hearing and balance damage). Memory aid: the '-mycin' aminoglycosides hurt the ears and kidneys, so monitor peaks, troughs, and creatinine.
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Key points
Understand these first
Nephrotoxicity is a major risk and is monitored with BUN, creatinine, and urine output.
Ototoxicity can cause permanent hearing loss, tinnitus, vertigo, and balance problems.
Peak and trough levels are drawn to keep the drug effective while avoiding toxicity; the trough is drawn just before the next dose.
Toxicity risk rises with high troughs, dehydration, advanced age, and concurrent use of other nephrotoxic or ototoxic drugs (such as loop diuretics or vancomycin).
They can cause neuromuscular blockade and respiratory depression, especially with anesthesia.
They are not absorbed orally for systemic use, so they are given IV or IM for systemic infection.
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Nursing priorities
What to do, in order
Monitor renal function (BUN, creatinine) and intake and output throughout therapy.
Draw peak and trough levels as ordered and report levels outside therapeutic range.
Assess for hearing changes, ringing in the ears, dizziness, and balance problems.
Ensure adequate hydration to protect the kidneys.
Monitor for additive toxicity when combined with other nephrotoxic or ototoxic drugs.
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Red flags — report now
Escalate immediately
Rising BUN/creatinine or decreasing urine output indicating nephrotoxicity.
New hearing loss, tinnitus, or vertigo indicating ototoxicity.
Elevated trough level indicating accumulation and toxicity risk.
Respiratory depression or muscle weakness suggesting neuromuscular blockade.
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Labs & values
Numbers to know
Creatinine (0.6-1.2 mg/dL)
BUN (10-20 mg/dL)
Drug peak and trough levels (e.g., gentamicin trough below 2 mcg/mL)
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Patient teaching
What patients must know
Report any ringing in the ears, hearing changes, or dizziness immediately.
Drink plenty of fluids to help protect your kidneys.
Keep all lab appointments for blood level and kidney monitoring.
❓ Aminoglycosides: NCLEX FAQs
What are the priority nursing interventions for Aminoglycosides?
Monitor renal function (BUN, creatinine) and intake and output throughout therapy. Draw peak and trough levels as ordered and report levels outside therapeutic range. Assess for hearing changes, ringing in the ears, dizziness, and balance problems. Ensure adequate hydration to protect the kidneys.
What are the warning signs of Aminoglycosides a nurse must report?
Rising BUN/creatinine or decreasing urine output indicating nephrotoxicity. New hearing loss, tinnitus, or vertigo indicating ototoxicity. Elevated trough level indicating accumulation and toxicity risk. Respiratory depression or muscle weakness suggesting neuromuscular blockade.
What do I need to know about Aminoglycosides for the NCLEX?
Nephrotoxicity is a major risk and is monitored with BUN, creatinine, and urine output. Ototoxicity can cause permanent hearing loss, tinnitus, vertigo, and balance problems. Peak and trough levels are drawn to keep the drug effective while avoiding toxicity; the trough is drawn just before the next dose. Toxicity risk rises with high troughs, dehydration, advanced age, and concurrent use of other nephrotoxic or ototoxic drugs (such as loop diuretics or vancomycin).
What patient teaching is important for Aminoglycosides?
Report any ringing in the ears, hearing changes, or dizziness immediately. Drink plenty of fluids to help protect your kidneys. Keep all lab appointments for blood level and kidney monitoring.
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Quick Tip
Nephrotoxicity is a major risk and is monitored with BUN, creatinine, and urine output.