Lidocaine/multivalent ion complex as a potential strategy for prolonged local anesthesia

Area of Science:

• Pharmacology
• Anesthesiology
• Materials Science

Background:

• Local anesthetics like lidocaine are crucial for managing perioperative and postoperative pain.
• Their clinical utility is often limited by a short duration of action.
• There is a need for extended-duration anesthetic formulations.

Purpose of the Study:

• To develop a novel formulation for prolonged local anesthesia.
• To create a lidocaine complex with an extended duration of action.
• To evaluate the efficacy and safety of the new formulation.

Main Methods:

• Preparation of a lidocaine/multivalent ion complex (icLD) using aqueous solutions.
• In vitro studies to assess drug release kinetics.
• In vivo experiments to evaluate anesthetic duration and neurotoxicity.

Main Results:

• The icLD formulation demonstrated sustained lidocaine release.
• Achieved a long duration of nerve blockade, approximately 14 hours.
• No significant increase in neurotoxicity compared to standard lidocaine was observed.

Conclusions:

• The lidocaine/multivalent ion complex (icLD) provides prolonged anesthesia.
• This formulation offers a practical strategy for extended pain management.
• icLD shows potential for effectively controlling perioperative and postoperative pain.