Levobupivacaine

Indications
 Injection
Surgical anaesthesia
Adult: Epidural block: 50-100 mg (10-20 ml) of a 0.5% solution or 75-150 mg (10-20 ml) of a 0.75% solution. Caesarean section: 75-150 mg (15-30 ml) of a 0.5% solution. Spinal block: 15 mg (3 ml) of a 0.5% solution. Max: 150 mg/dose; 400 mg/day.
Injection
Peripheral nerve block
Adult: 2.5-150 mg or 1-2 mg/kg (0.4 ml/kg) of a 0.25 or 0.5% solution. Not to exceed 40 ml. Max: 150 mg/dose; 400 mg/day.
Injection
Infiltration anaesthesia
Adult: Up to 150 mg (60 ml) of a 0.25% solution. For peribulbar block in ophth procedures: 37.5-112.5 mg (5-15 ml) of a 0.75% solution. Max: 150 mg/dose; 400 mg/day.
Child: For ilioinguinal or iliohypogastric blocks in children <12 yr: 0.625-2.5 mg/kg (0.25-0.5 ml/kg) of a 0.25 or 0.5% solution.
Injection
Acute pain
Adult: Pain relief during labour: 15-50 mg (6-20 ml) of a 0.25% solution, to be given as a bolus dose; alternatively, dose may be given via continuous infusion at 5-12.5 mg (4-10 ml) per hr using 0.125% solution or 5-12.5 mg (8-20 ml) per hr using 0.0625% solution. Postoperative pain: 10-25 mg (4-10 ml) per hr of a 0.25% solution, 12.5-18.75 mg (10-15 ml) per hr of a 0.125% solution or 12.5-18.75 mg (20-30 ml) per hr of a 0.0625% solution; dose may be given as an epidural infusion. Max: 150 mg/dose; 400 mg/day.

Reconstitution: When needed, dilutions should be made with normal saline.
Contraindications
 Not to be used in IV regional anesth (Bier's block) and paracervical block in obstetrics. Do not use 0.75% solution for epidural block in obstetrics. Hypovolaemia, complete heart block.
Warnings / Precautions
 Epilepsy, respiratory impairment, impaired cardiac conduction, bradycardia, severe shock, acute porphyria, myasthenia gravis, renal or hepatic impairment. Pregnancy, lactation. Reduce dose in elderly or debilitated patients. Resuscitative equipment should be available. Do not use solutions containing adrenaline for anesth in appendages. Do not use solutions containing preservatives for caudal or epidural block.
Adverse Reactions
 CNS effects such as restlessness, anxiety, dizziness, confusion, respiratory depression and convulsions. Neuromuscular and skeletal weakness, blurred vision, pupillary constriction, tinnitus. Hypotension, bradycardia and CV collapse which may lead to cardiac arrest. Rarely, hypersensitivity reactions.
Drug Interactions
 Plasma levels may be reduced when used with enzyme-inducing drugs such as rifampicin. Substrates for or inhibitors of CYP3A4 and CYP1A2 may affect the plasma levels of levobupivacaine.
See Below for More levobupivacaine Drug Interactions
Mechanism of Actions
 Levobupivacaine is a long acting local anaesthetic of the amide type. It is the S-enantiomer of bupivacaine. It blocks nerve conduction in sensory and motor nerves mainly by interacting with voltage sensitive sodium channels on the cell membrane. It also interferes with impulse transmission and conduction in other tissues. Levobupivacaine is given as the hydrochloride for infiltration anaesthesia and regional nerve blocks including epidural block. It is contraindicated in obstetric paracervical block and IV regional anaesthesia (Bier's block). The 0.75% solution is also contraindicated for epidural blocks in obstetrics.
Distribution: Protein binding: At least 97%. Volume of distribution after IV admin: 67 litres.
Metabolism: Extensively metabolised in liver. Major metabolite: 3-Hydroxylevobupivacaine.
Excretion: Mean half-life after IV admin: About 80 min. Excreted as its metabolites largely in the urine, with some in faeces.
Storage Conditions
 Injection: To be used immediately after opening. After dilution in normal saline: Chemical and physical in-use stability at 20-22°C for 7 days.
ATC Classification
 N01BB10 - levobupivacaine ; Belongs to the class of amides. Used as local anesthetics.
Storage
 Injection: To be used immediately after opening. After dilution in normal saline: Chemical and physical in-use stability at 20-22°C for 7 days.
Available As
  • Levobupivacaine 2 mg

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