Hyaluronic acid–lidocaine non-covalent complex (HA-Lidocaine) (HA-Lidocaine)

The hyaluronic acid–lidocaine non-covalent complex is a pharmaceutical formulation that combines a high-molecular-weight glycosaminoglycan with a local anesthetic (PubChem, NIH). It is primarily used in medical aesthetics as a dermal filler and in orthopedics for the treatment of osteoarthritis through intra-articular injection (Clinical, Cosmetic and Investigational Dermatology). The complex is formed through non-covalent ionic interactions between the anionic carboxylate groups of hyaluronic acid and the cationic amine of lidocaine, which helps in stabilizing the anesthetic and providing immediate pain relief upon administration (Journal of Pharmaceutical Sciences). While hyaluronic acid serves as a structural scaffold and lubricant by interacting with receptors like CD44, lidocaine acts by blocking voltage-gated sodium channels on sensory neurons (StatPearls, NCBI). This combination enhances patient comfort during invasive procedures and improves the overall therapeutic experience. It is classified as a drug delivery system or combination product rather than a discrete biological target.

Other names

Lidocaine-hyaluronic acid complexHA-Lido formulationHyaluronan-lidocaine complexLidocaine-containing hyaluronic acid filler

Lidocaine within the complex inhibits voltage-gated sodium channels to block nerve conduction and provide anesthesia, while the hyaluronic acid component provides mechanical lubrication, water retention, and structural support in the extracellular matrix (StatPearls; PubChem).