Overview
Levobupivacaine is a long-acting local anesthetic of the amide type, the S-enantiomer of bupivacaine. It is used for surgical anesthesia and postoperative pain management via various regional anesthesia techniques. It has a similar duration of action to bupivacaine but with a potentially improved cardiovascular safety profile.
Mechanism of Action
Levobupivacaine blocks voltage-gated sodium channels on neuronal membranes, inhibiting the initiation and conduction of nerve impulses. This produces reversible local anesthesia by preventing depolarization of nerve fibers.
Indications
- Surgical anesthesia
- Postoperative pain management
- Regional anesthesia (epidural, spinal, peripheral nerve blocks)
- Local infiltration anesthesia
Dosage
Dosage varies by route, procedure, and patient factors. Typical concentrations: 0.125% to 0.75%. Maximum recommended dose: 150 mg for most procedures. Always use the lowest effective dose.
Black Box Warning
WARNING: CARDIAC ARREST AND DEATH WITH UNINTENTIONAL INTRAVASCULAR INJECTION Levobupivacaine can cause cardiac arrest and death, most commonly due to unintended intravascular injection. Use with extreme caution and appropriate monitoring.
Contraindications
- Hypersensitivity to levobupivacaine, amide-type local anesthetics, or any component
- Intravenous regional anesthesia (Bier block)
- Obstetric paracervical block anesthesia
Side Effects
- Hypotension
- Bradycardia
- Nausea
- Vomiting
- Back pain
- Headache
- Fever
- Paresthesia
- Urinary retention
- Cardiac arrhythmias (with systemic toxicity)
- Seizures (with systemic toxicity)
Interactions
- Class I antiarrhythmic drugs (e.g., lidocaine) - additive cardiac effects
- Other local anesthetics - additive toxicity
- MAO inhibitors, tricyclic antidepressants - may enhance pressor response with epinephrine-containing solutions