Aspercreme 4% Lidocaine Pain Relief Cream, graded Moderate-evidence on Magellan — best for small, well-localised pain — the strongest evidence is the 5% patch for shingles nerve pain, though one trial found an OTC-strength patch comparable. Studied dose: 4% OTC cream/patch to a small area up to 3–4×/day (the 5% patch is prescription).
Source: Drugs 2004, PMID 15101784 ↗ · Topical Pain Relief · How Magellan grades evidence · Study write-up · evidence confidence: high
Lidocaine is a local anesthetic of the amino-amide class that works by blocking voltage-gated sodium channels on sensory nerve fibers, preventing the initiation and conduction of pain signals. Applied to intact skin as a cream, gel, or medicated patch, it acts locally at the site of application with limited absorption into the bloodstream. It is available over the counter in lower-strength formulations (such as 4% creams and patches) and by prescription as a 5% medicated patch used mainly for postherpetic neuralgia.
The best-supported use of topical lidocaine is localized neuropathic pain, especially postherpetic neuralgia, where guidelines and reviews position the 5% medicated plaster as a first- or second-line option that appears comparable to systemic pregabalin with far fewer systemic side effects, owing to its low absorption. This makes it attractive for older or medically complex patients, though rigorous analyses caution that high-quality randomized evidence is limited and average effect sizes are modest. Evidence beyond nerve pain is thinner but not absent: a double-blind trial found an over-the-counter-strength lidocaine patch non-inferior to the prescription 5% patch and superior to placebo for back pain and arthritis, the 5% patch compared favorably with celecoxib for knee osteoarthritis in another trial, and a 2024 meta-analysis supports benefit in post-surgical neuropathic pain. US regulators have also warned against illegally high-strength numbing products sold online — a reason to stay within labeled doses. This evidence describes topical lidocaine as a compound and mechanism, not this specific commercial product.
Peer-reviewed studies on the active compound — citations link to PubMed.
“In patients with PHN, the lidocaine patch 5% has demonstrated relief of pain and tactile allodynia with a minimal risk of systemic adverse effects... recommended as a first-line therapy.”
“In all but one study, evidence indicated that lidocaine was better than placebo for some measure of pain relief. Clinical experience also supports efficacy in some patients.”
“LMP was found to be similar to pregabalin in reducing pain in all populations but had a better adverse events profile.”
“a weak recommendation for capsaicin 8% patches, capsaicin cream, and lidocaine 5% plasters as second-line recommendation”
“In chronic musculoskeletal conditions with assessments over 6 to 12 weeks, topical diclofenac and ketoprofen had limited efficacy in hand and knee osteoarthritis, as did topical high-concentration capsaicin in postherpetic neuralgia.”
“with level A evidence in support of tricyclic antidepressants (TCA), pregabalin, gabapentin, tramadol and opioids (in various conditions), duloxetine, venlafaxine, topical lidocaine and capsaicin patches (in restricted conditions).”
Research describes the active mechanism and is not a claim about this specific product.
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Yes — its active compound is linked to 22 peer-reviewed studies, summarized and cited above.
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