Diclofenac gel for joints, lidocaine for a small patch of nerve pain. Topical diclofenac is the best-evidenced over-the-counter pain topical on this site — Cochrane found about 60% of participants had much reduced pain over 6 to 12 weeks in hand and knee osteoarthritis. Lidocaine's strongest data are the prescription 5% patch for shingles nerve pain. Diclofenac is still an NSAID.
| Compared on | Diclofenac 1% gel | Lidocaine 4% cream |
|---|---|---|
| Evidence grade | Strong evidence | Moderate evidence |
| What it is | Diclofenac is a nonsteroidal anti-inflammatory drug (NSAID) that inhibits cyclo-oxygenase (COX) enzymes, reducing synthesis of the prostaglandins that drive inflammation and pain. | 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. |
| Best human evidence | “In studies lasting 6 to 12 weeks, topical diclofenac and topical ketoprofen were significantly more effective than carrier for reducing pain; about 60% of participants had much reduced pain.” Cochrane Database Syst Rev 2016 · PMID 27103611 | “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.” Cochrane Database Syst Rev 2014 · PMID 25058164 |
| Dose / protocol studied | 1% gel (~2–4 g) over the joint up to 4×/day; relief builds over ~7 days | 4% OTC cream/patch to a small area up to 3–4×/day (the 5% patch is prescription) |
| Typical listed price | $25.59 | $13.00 |
| Who it suits | Someone with hand or knee osteoarthritis pain, particularly an older adult for whom oral NSAIDs carry more systemic risk. | Someone with a small, well-localised area of nerve-type pain who wants relief without systemic drug exposure. |
| Who should skip it | Anyone already taking an oral NSAID without medical advice, anyone with an NSAID allergy, and anyone in late pregnancy. | Anyone with widespread pain — the labelled use is a small area — and anyone tempted by unregulated high-strength numbing products sold online. |
| Key caveat | The best-evidenced OTC pain topical — Cochrane and meta-analysis support for hand and knee osteoarthritis, with low systemic absorption. Relief is symptomatic and modest (about 1 in 10 extra users gets at least halved pain over 6–12 weeks), and it is still an NSAID: don’t combine with oral NSAIDs without advice, and avoid with NSAID allergy or in late pregnancy. | 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. Cochrane notes high-quality RCTs are limited, and relief is purely symptomatic. Don’t exceed the labelled area or frequency, and avoid unregulated high-strength numbing products sold online. |
Diclofenac 1% gel lists at about 2.0× the price of Lidocaine 4% cream. Prices are the typical listed prices in our catalog, not live Amazon prices, and a true cost-per-studied-dose is not shown because our catalog does not record servings per container — we would have to guess, so we don't.
These are over-the-counter drugs with different mechanisms and different labelled uses. Match the mechanism to the pain, and stay inside the label.
Diclofenac gel. Cochrane's analysis of 6 to 12-week trials found topical diclofenac significantly more effective than carrier, with about 60% of participants reporting much reduced pain, and a 2025 meta-analysis found gel, solution and patch formulations all improved pain and function in knee osteoarthritis.
Lidocaine. Guidelines and reviews position the 5% medicated plaster as a first- or second-line option for postherpetic neuralgia, comparable to systemic pregabalin with far fewer systemic side effects. One trial found an over-the-counter-strength patch non-inferior to the prescription 5% patch.
Topical, and tell your clinician which. A safety review focused on older adults found topical NSAIDs preferable to oral agents on systemic-safety grounds, because only a small fraction of the drug is absorbed. That is an argument for topical over oral, not for stacking both.
Neither — both are symptomatic. Relief from either is symptomatic and modest. Diclofenac's Cochrane number needed to treat was roughly 10 over 6 to 12 weeks, and rigorous analyses note that high-quality randomized evidence for topical lidocaine is limited with modest average effect sizes.
Each quote below is taken verbatim from the cited paper. Null and negative results are included on purpose — they are the reason a grade means anything.
“In studies lasting 6 to 12 weeks, topical diclofenac and topical ketoprofen were significantly more effective than carrier for reducing pain; about 60% of participants had much reduced pain.”
“Topical diclofenac formulations (gel, solution, patch) significantly improve pain and function in knee osteoarthritis compared to placebo. All formulations were well-tolerated.”
“Diclofenac sodium gel decreased pain intensity scores by 42%-45%, total AUSCAN scores by 35%-40%, and global rating of disease by 36%-40%.”
“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”
Links go to an Amazon search for the product name, not to a specific listing, so you can compare sellers, price and third-party testing yourself.
For osteoarthritis joint pain, yes — topical diclofenac has the stronger evidence and is recommended by major osteoarthritis guidelines as an early option. For localized nerve pain, lidocaine is the better-matched mechanism.
Do not combine topical diclofenac with oral NSAIDs without medical advice. It is still an NSAID even though systemic absorption is low.
Relief builds over about 7 days with regular application, and the trial evidence covers 6 to 12 weeks of use.
One 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. Most of the guideline-level evidence still comes from the 5% patch.
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