Applications

4.1 Local Anesthetic

• Mechanism: Amide-type local anesthetic blocking voltage-gated sodium channels in neuronal membranes, inhibiting action potential generation/propagation for reversible pain loss.
• Usage Scenarios:
  • Dentistry: Infiltration/nerve block for tooth extraction, root canal, periodontal surgery.
  • Surgery: Surface/infiltration/epidural anesthesia for minor procedures (e.g., suturing, skin biopsy).
  • Emergency Medicine: Topical anesthesia for wound debridement, burn care, endotracheal intubation.
  • Obstetrics: Pudendal nerve block for vaginal delivery pain relief.

4.2 Antiarrhythmic Agent 

• Indication: Treatment/prevention of ventricular arrhythmias (e.g., premature ventricular contractions, ventricular tachycardia/fibrillation) post-myocardial infarction or during cardiac surgery.
• Mechanism: Reduces sodium influx into myocardial Purkinje fibers, slowing phase 0 depolarization and suppressing ectopic automaticity without affecting normal conduction.

4.3 Other Medical Uses

• Neuropathic Pain: Topical/transdermal formulations for postherpetic neuralgia, diabetic neuropathy, and chronic regional pain syndrome.
• Anti-Inflammatory: Inhibits neutrophil/macrophage activation and pro-inflammatory cytokine (IL-1β, IL-6) release; used in postoperative pain management.
• Oncology Research: Investigated for anti-tumor effects (inhibits cancer cell proliferation/migration via upregulating miR-145 and suppressing MEK/ERK/NF-κB pathways).

4.4 Research & Industrial

• Neuroscience: Tool for studying neuronal excitability and sodium channel function in vitro/in vivo.
• Pharmaceutical Intermediate: Raw material for lidocaine formulations (injections, creams, patches, gels).

5. Safety Information

• Hazard Codes: Xn (Harmful)
• Risk Statements: R22 (Harmful if swallowed)
• Safety Statements: S36 (Wear suitable protective clothing)
• UN Number: UN 2811 (6.1/PG 3, Toxic solid)
• WGK Germany: 3 (Highly hazardous to water)
• Toxicity: Oral LD50 (rat): 207 mg/kg; may cause CNS toxicity (dizziness, seizures) or cardiac arrhythmia at high doses.
• Handling: Use fume hood, nitrile gloves, safety goggles; avoid inhalation, skin/eye contact.