Lidocaine 10% w/v spray is a topical local anesthetic for rapid surface anesthesia of mucous membranes in procedures across dentistry, ENT, obstetrics, and endoscopy, typically delivering 10 mg lidocaine per metered spray for short‑lasting, localized numbness. It works by blocking voltage‑gated sodium channels in peripheral nerves, stabilizing membranes and preventing action potential propagation to achieve local anesthesia within minutes. Onset is usually 1–3 minutes with about 15 minutes duration on mucosa, and absorption is higher from mucous membranes than intact skin due to tissue permeability.