Capsaicin
QutenzaPubChem CID 1548943 · 3D model
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Overstimulates and then locally desensitizes the skin's pain-sensing nerve endings by activating TRPV1 — the same 'heat' sensor that makes chili peppers feel hot.
How it works
Capsaicin is the same compound that makes chili peppers taste hot — it works by locking onto a heat/pain sensor on nerve endings called TRPV1. At first, activating this sensor causes a burning feeling, which is why capsaicin creams sting. But the medical patch version (Qutenza) uses a strong 8% concentration held on the skin for 30 to 60 minutes in a doctor's office, and this intense activation does two things: it makes the sensor stop responding, and it causes the very tips of the pain-sensing nerve fibers in that patch of skin to temporarily pull back. With fewer active nerve endings there to send pain signals, patients get weeks to months of pain relief, and the nerve endings normally grow back over time. It's a different strategy from an oral medication like pregabalin, also on this site, which works throughout the whole body by calming overactive nerve signaling at calcium channels — capsaicin instead works only in the treated patch of skin, right where the nerve endings are.
What it’s used for
Qutenza is a capsaicin patch that a healthcare provider applies directly to painful skin for lasting nerve pain relief. It's approved for two conditions: nerve pain that lingers after a shingles infection (postherpetic neuralgia), and nerve pain in the feet caused by diabetes. Because it works locally on nerve endings in the skin rather than throughout the whole body, it can be a helpful option for patients who want to reduce systemic pain medication. A treatment session can ease pain for weeks to months, and it can be repeated as needed.
- Mechanism
- TRPV1 (capsaicin receptor) agonist — induces reversible nociceptor defunctionalization
- Drug class
- Small molecule
- Therapeutic area
- Analgesic / Pain