Capzasin-HP Capsaicin 0.1% Pain Relief Cream, graded Moderate-evidence on Magellan — a 2024 meta-analysis of 8 trials found a significant advantage over placebo while rating the certainty of the evidence low to very low. Network analyses place capsaicin behind topical NSAIDs for osteoarthritis, and reviewers suggest it mainly as a short-term option for people who cannot tolerate NSAIDs.
Source: Cochrane Database Syst Rev 2017, PMID 28085183 ↗ · Topical Pain Relief · How Magellan grades evidence · Study write-up · evidence confidence: high
Capsaicin is the pungent alkaloid responsible for the heat of chili peppers (Capsicum species). Applied to the skin, it binds the transient receptor potential vanilloid 1 (TRPV1) receptor on sensory nerve fibers, triggering release and then depletion of the pain neurotransmitter substance P and, with repeated use, a reversible 'defunctionalization' or desensitization of pain-signaling nociceptors. Low-concentration topical capsaicin creams (commonly 0.025% to 0.1%) are sold over the counter for temporary relief of minor musculoskeletal and arthritis pain, while a high-concentration 8% patch is applied under medical supervision for neuropathic pain.
Randomized trials and meta-analyses show that topical capsaicin produces modest reductions in pain from hand and knee osteoarthritis — a 2024 meta-analysis of 8 trials found a significant advantage over placebo while rating the certainty of the evidence low to very low — and it offers benefit in neuropathic conditions such as postherpetic neuralgia, where the strongest data are for the high-concentration 8% prescription patch. Network analyses place capsaicin behind topical NSAIDs for osteoarthritis, and reviewers suggest it mainly as a short-term option for people who cannot tolerate NSAIDs. Onset is slow (often 1 to 4 weeks of repeated daily application), and burning or stinging at the application site is very common — in the 2024 analysis about one extra user in three experienced it, for a number-needed-to-harm of 3 — though capsaicin avoids the gastrointestinal and cardiovascular risks of oral NSAIDs. Blinding is difficult because of that characteristic burning, so several reviews rate its efficacy as modest or uncertain. This evidence describes the capsaicin compound and its TRPV1 mechanism generally, not this specific commercial product.
Peer-reviewed studies on the active compound — citations link to PubMed.
“High-concentration topical capsaicin used to treat postherpetic neuralgia, HIV-neuropathy, and painful diabetic neuropathy generated more participants with moderate or substantial levels of pain relief than control.”
“Mean pain reduction was 1.2 on ibuprofen and 1.6 on capsaicin... 59% of people displayed a greater response to one treatment over the other.”
“Capsaicin treatment efficacy (vs. placebo) for change in VAS pain score was moderate, at 0.44 (95% CI 0.25-0.62) over 4 weeks of treatment.”
“The relative benefit from topical capsaicin 0.025% or plaster compared with placebo was 1.5 (1.1 to 2.0) and the number needed to treat was 8.1 (4.6 to 34).”
“Current evidence indicates that topical NSAIDs and capsaicin in licensed doses may be equally effective for pain relief in OA.”
“High-concentration topical capsaicin… generated more participants with moderate or substantial levels of pain relief than control… usually with additional improvements in sleep, fatigue, depression, and quality of life.”
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 17 peer-reviewed studies, summarized and cited above.
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