Lidocaine is a local anesthetic and antiarrhythmic agent that blocks sodium channels in peripheral nerves, preventing pain signal transmission. Topically applied, it provides targeted anesthesia and analgesia at the application site with minimal systemic absorption at standard concentrations.

Compounded topical lidocaine is one of the most versatile compounds in pain management — used as a standalone high-concentration local anesthetic for procedures, as part of multi-drug pain creams targeting multiple pain pathways, and for chronic conditions like vulvodynia, neuropathy, and mucositis.

The most commonly compounded lidocaine preparations include high-concentration creams (10–30%) for procedural anesthesia, and multi-drug combinations pairing lidocaine with gabapentin, diclofenac, cyclobenzaprine, and other agents for complex neuropathic and musculoskeletal pain.

Sodium Channel Blockade
Lidocaine binds to and blocks voltage-gated sodium channels in peripheral nerve axons, preventing the influx of sodium ions required for action potential initiation and propagation. This produces reversible loss of sensation (anesthesia) and pain signal interruption (analgesia).

Selectivity by Fiber Type
At lower concentrations, lidocaine preferentially blocks smaller, unmyelinated C-fibers (pain and temperature) before larger motor fibers — allowing pain relief without complete sensory or motor block.

Procedural numbing (10–30% cream): Apply thick layer under occlusion 30–60 minutes before procedure

Chronic pain / neuropathy (2–10% cream): Apply to affected area 2–4x daily as needed

Multi-drug compound: 1–2g applied 3–4x daily per provider formulation

Do not apply to mucous membranes at high concentrations without provider guidance. Avoid large surface area application to minimize systemic absorption.