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Atracurium

Non-depolarising neuromuscular blocker (benzylisoquinolinium) · Skeletal Muscle Relaxant, Anesthesia Adjunct

Also known as Atracurium besilate, Tracrium

START
Intubation 0.4–0.5 mg/kg IV; maintenance bolus 0.1 mg/kg or infusion 5–9 mcg/kg/min
TYPICAL MAX
Titrated to train-of-four monitoring (no fixed ceiling)
STOP IF
Anaphylaxis, severe bronchospasm/hypotension
WATCH
Neuromuscular (train-of-four) monitoring, BP/HR after bolus, ensure ventilation/reversal availability
CDSCO approvedSchedule HATC M03AC04
Dose laddermg/d
7start28titrate35ceiling
Renal dose adjustmenteGFR mL/min/1.73m²
FULLNo dose adjustment at any eGFR (Hofmann/ester elimination)90

KDIGO 2024 + manufacturer label

Pharmacokineticsplasma · t hours
3minONSET5minPEAK20min30minDURATION
ONSET
3min · onset (~3 min)
PEAK
5min · peak block (~5 min)
20min · plasma t½ (~20 min)
DURATION
30min · clinical block (~30 min)
EXCRETION
Hofmann elimination + ester hydrolysis; non-renal
route + CYP
INTERACTIONS
12 major
SEVERE in our sources
PREGNANCY
Use if required for anaesthesia — does not readily cross placenta in clinically significant amounts
FDA category + note
Top interactionssee all 12
  • AmikacinSevereDatabaseDDInter
  • AminoglycosidesSevereDatabaseKimi deep-research + Cla
  • Botulinum Toxin Type ASevereDatabaseDDInter
  • Botulinum Toxin Type BSevereDatabaseDDInter
Available in India

33 branded formulations. Look up specific brands in the Drugs workspace.

Mechanism

Competitive antagonist at the postsynaptic nicotinic acetylcholine receptor of the motor end-plate, producing skeletal muscle relaxation; eliminated organ-independently by Hofmann elimination and ester hydrolysis.

Indications

Skeletal muscle relaxation for tracheal intubation and surgeryFacilitation of mechanical ventilation in ICU

Dosing

Adult
Intubation 0.4–0.5 mg/kg IV bolus; maintenance 0.08–0.1 mg/kg every 15–25 min or infusion 5–9 mcg/kg/min.
Pediatric
≥1 month similar weight-based (specialist anaesthesia).
Renal adjustment
No adjustment (organ-independent elimination).
Hepatic adjustment
No adjustment.
Geriatric
No specific adjustment; titrate to monitoring.
Max dose
Titrated to neuromuscular monitoring (no fixed ceiling)

Pharmacokinetics

Onset
~2–3 min
Peak effect
~3–5 min
Duration
~20–35 min (intermediate)
Half-life
~20 min
Bioavailability
100% IV
Protein binding
~82%
Metabolism
Hofmann elimination + non-specific ester hydrolysis (→ laudanosine)
Excretion
Renal/biliary (metabolites; laudanosine)

Contraindications

  • Known hypersensitivity to atracurium or benzylisoquinolinium agents
  • Use only by clinicians skilled in airway management/ventilation

Side effects

Common
Histamine release: flushing, transient hypotension, tachycardiaBronchospasm (mild)Skin wheal at injection
Serious
  • Anaphylaxis
  • Severe bronchospasm/hypotension (rapid bolus, histamine)
  • Prolonged paralysis (ICU, with potentiating drugs)
  • Laudanosine accumulation (seizure risk, prolonged ICU/renal failure — theoretical)

Pregnancy & lactation

Pregnancy

Use if required for anaesthesia — does not readily cross placenta in clinically significant amounts

Lactation

Single intraoperative use compatible (not orally bioavailable)

Drug interactions

Amikacin
Severe
Database

Clinical effect not specified

Source: DDInter

Aminoglycosides
Severe
Database

Potentiated/prolonged neuromuscular blockade

Reduce dose; monitor train-of-four; have reversal/ventilation

Source: Kimi deep-research + Cla

Botulinum Toxin Type A
Severe
Database

Clinical effect not specified

Source: DDInter

Botulinum Toxin Type B
Severe
Database

Clinical effect not specified

Source: DDInter

Colistimethate
Severe
Database

Clinical effect not specified

Source: DDInter

Gentamicin
Severe
Database

Prolonged paralysis, respiratory failure

Monitor neuromuscular function. May need extended ventilation.

Source: DDInter

Kanamycin
Severe
Database

Clinical effect not specified

Source: DDInter

Magnesium Sulfate
Severe
Database

Marked potentiation of block

Reduce dose; close neuromuscular monitoring

Source: Kimi deep-research + Cla

Neomycin
Severe
Database

Clinical effect not specified

Source: DDInter

Netilmicin
Severe
Database

Clinical effect not specified

Source: DDInter

Paromomycin
Severe
Database

Clinical effect not specified

Source: DDInter

Plazomicin
Severe
Database

Clinical effect not specified

Source: DDInter

Related guidelines

Ask House about Atracurium

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Sources: KD Tripathi 7e, Goodman & Gilman 14e, Katzung, BNF·Verified: 2026-05-19 · House clinical team·Cockpit curated: 2026-05-19