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Amikacin

Aminoglycoside · Antibiotic

Also known as Amikacin sulfate

START
Confirm gram-negative infection/susceptibility; baseline creatinine, audiogram if available; calculate IBW/ABW. Loading dose: 15 mg/kg IV (max 1.5 g).
TYPICAL MAX
15 mg/kg/day (1.5 g/day); cumulative max 15 g/course. Do not exceed peak >35 mcg/mL or trough >10 mcg/mL.
STOP IF
Rising creatinine (>0.5 mg/dL from baseline), evidence of ototoxicity (tinnitus, hearing loss), vestibular symptoms, severe hypersensitivity
WATCH
Renal function (daily creatinine), hearing (audiometry if course >7 days or pre-existing renal impairment), serum levels if conventional dosing (peak 30 min post-dose; trough pre-dose)
CDSCO approvedSchedule HJan AushadhiATC J01GB06
Dose laddermg/d
750start1kmax1.5kceiling
Renal dose adjustmenteGFR mL/min/1.73m²
FULLFull dose: 15 mg/kg IV q24h60REDUCE7.5 mg/kg q24h or full …40REDUCE7.5 mg/kg q48h20REDUCE3.75-7.5 mg/kg q48-72h;…90

KDIGO 2024 + manufacturer label

Pharmacokineticsplasma · t hours
11minONSET45minPEAK2.5h1dDURATION
ONSET
11min · absorption onset
PEAK
45min · 30-60 min post-infusion
2.5h · 2-3 h (normal); 30-70 h (ESRD)
DURATION
1d · 24 h (once-daily dosing)
EXCRETION
94-98% renal unchanged within 24h; not metabolized
route + CYP
INTERACTIONS
12 major
SEVERE in our sources
PREGNANCY
FDA PLLR: Aminoglycosides can cause fetal harm. Ototoxicity has been reported in fetuses exposed in utero. Use only if clearly needed and benefit outweighs risk. Avoid if possible, especially in first trimester.
FDA category + note
Top interactionssee all 12
  • AtracuriumSevereDatabaseDDInter
  • BacitracinSevereDatabaseDDInter
  • Botulinum Toxin Type ASevereDatabaseDDInter
  • Botulinum Toxin Type BSevereDatabaseDDInter
Available in India

1,746 branded formulations and 7 fixed-dose combinations. Look up specific brands in the Drugs workspace.

Jan Aushadhi — generic available at GoI pharmacies

Mechanism

Amikacin is a semisynthetic aminoglycoside antibiotic derived from kanamycin A. It exerts bactericidal activity by irreversibly binding to the 30S ribosomal subunit, causing misreading of mRNA and inhibition of bacterial protein synthesis. The 1-N-(L-4-amino-2-hydroxybutyryl) side chain confers resistance to most bacterial aminoglycoside-inactivating enzymes, making amikacin active against many gentamicin- and tobramycin-resistant gram-negative organisms.

Indications

Serious infections caused by susceptible gram-negative bacilli ( Pseudomonas aeruginosa, Acinetobacter baumannii, Enterobacteriaceae)Mycobacterium avium complex (MAC) infections (as part of combination therapy)Mycobacterial infections in combination regimens (M. chelonae, M. fortuitum)Nocardiosis (combination therapy)Empiric therapy for febrile neutropenia (in combination with beta-lactam)Hospital-acquired/ventilator-associated pneumonia (combination therapy)Intra-abdominal infections (combination with metronidazole and beta-lactam)Complicated urinary tract infections (resistant organisms)

Dosing

Adult
Conventional dosing: 15 mg/kg/day IV/IM divided q8-12h (max 1.5 g/day). Once-daily dosing (preferred): 15 mg/kg IV once daily (max 1.5 g/day). Extended interval: 15-20 mg/kg IV q24h. Dosing weight: use ideal body weight (IBW) if BMI ≤30; adjusted body weight if obese.
Pediatric
Conventional: 5-7.5 mg/kg IV/IM q8h (max 15 mg/kg/day). Once-daily (≥3 months): 15-22.5 mg/kg IV q24h. Neonates (≥34 weeks GA): 15 mg/kg IV q24-48h; <34 weeks: 15 mg/kg IV q48h.
Renal adjustment
CrCl >60: full dose q24h. CrCl 40-60: 7.5 mg/kg q24h (or full dose q36-48h). CrCl 20-39: 7.5 mg/kg q48h. CrCl <20: 3.75-7.5 mg/kg q48-72h. HD: supplemental dose post-dialysis (3.75-7.5 mg/kg). CRRT: 7.5 mg/kg q24-48h.
Hepatic adjustment
No dosage adjustment required; minimal hepatic metabolism.
Geriatric
Reduce dose and extend interval based on renal function. Monitor serum levels closely. Elderly at higher risk for nephrotoxicity and ototoxicity.
Max dose
15 mg/kg/day; 1.5 g/day; maximum 15 g cumulative per course

Pharmacokinetics

Onset
Rapid bactericidal effect after IV administration; clinical response typically within 24-72 hours.
Peak effect
IV: immediate distribution; peak serum 30-60 min post-infusion. IM: peak at 1-2 hours.
Duration
Post-antibiotic effect (PAE) persists 2-8 hours against gram-negative bacilli.
Half-life
2-3 hours in normal renal function; 30-70 hours in end-stage renal disease (ESRD).
Bioavailability
IM: ~100%. Oral: negligible absorption (<1%). IV: 100% bioavailable.
Protein binding
Low: 0-11% (concentration-independent).
Metabolism
Not metabolized to any significant extent; excreted virtually unchanged.
Excretion
Primarily renal: 94-98% excreted unchanged in urine via glomerular filtration within 24 hours.

Contraindications

  • Hypersensitivity to amikacin or other aminoglycosides
  • Myasthenia gravis (may worsen neuromuscular blockade)
  • Multiple myeloma (increased risk of nephrotoxicity)
  • Relative: pre-existing severe renal impairment (dose reduction mandatory)

Side effects

Common
Nephrotoxicity (elevated creatinine/BUN, 1-10% — usually reversible)Ototoxicity — auditory (high-frequency hearing loss, tinnitus)Ototoxicity — vestibular (vertigo, ataxia, nystagmus)Injection site reactions (IM)Fever, rash (less common)
Serious
  • Acute tubular necrosis (ATN) and acute kidney injury (AKI)
  • Permanent bilateral sensorineural hearing loss (irreversible, dose/cumulative-related)
  • Vestibular toxicity (permanent balance disorders)
  • Neuromuscular blockade with respiratory paralysis (rare, especially with anesthesia/neuromuscular blockers)
  • Anaphylaxis and severe hypersensitivity reactions
  • Fetal harm when administered during pregnancy (ototoxicity risk to fetus)

Pregnancy & lactation

Pregnancy

FDA PLLR: Aminoglycosides can cause fetal harm. Ototoxicity has been reported in fetuses exposed in utero. Use only if clearly needed and benefit outweighs risk. Avoid if possible, especially in first trimester.

Lactation

Excreted in breast milk in low concentrations. Risk to nursing infant is low but theoretical (ototoxicity, nephrotoxicity). Consider discontinuing breastfeeding during treatment or monitor infant for adverse effects.

Drug interactions

Atracurium
Severe
Database

Clinical effect not specified

Source: DDInter

Bacitracin
Severe
Database

Clinical effect not specified

Source: DDInter

Botulinum Toxin Type A
Severe
Database

Clinical effect not specified

Source: DDInter

Botulinum Toxin Type B
Severe
Database

Clinical effect not specified

Source: DDInter

Bumetanide
Severe
Database

Drug interaction classified as: synergy

Source: DDInter

Capreomycin
Severe
Database

Clinical effect not specified

Source: DDInter

Cidofovir
Severe
Database

Clinical effect not specified

Source: DDInter

Cisatracurium
Severe
Database

Clinical effect not specified

Source: DDInter

Cisplatin
Severe
Database

Increased risk of acute kidney injury and ototoxicity

Avoid concomitant use. If unavoidable, monitor renal function and auditory function extremely closely. Consider alternative antibiotics if possible during cisplatin therapy.

Source: DDInter

Colistimethate
Severe
Database

Clinical effect not specified

Source: DDInter

Colistin
Severe
Database

Increased risk of acute kidney injury and respiratory depression/paralysis

Avoid concomitant use due to high risk of toxicity. If no other options, monitor renal function and respiratory status extremely closely. Be prepared for respiratory support.

Cyclosporine
Severe
Database

Increased risk of acute kidney injury and elevated cyclosporine levels due to impaired renal clearance.

Avoid concomitant use. If unavoidable, monitor renal function and cyclosporine trough levels very closely. Adjust cyclosporine dose as needed. Consider alternative antibiotics.

Source: DDInter

Related guidelines

Other Aminoglycoside drugs

Ask House about Amikacin

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Sources: KD Tripathi 7e, Goodman & Gilman 14e, Harrison 22e, Katzung·Verified: 2026-05-18 · House clinical team·Cockpit curated: 2026-05-18