capsaicin
Treatment for Cluster Headache
Capsaicin, when applied intranasally, acts as a potent TRPV1 receptor agonist that depletes substance P and other neuropeptides from sensory nerve endings, thereby interrupting neurogenic inflammation. Its mechanism involves desensitizing pain receptors and modulating trigeminal nerve signaling, which can provide rapid and significant relief for acute cluster headache symptoms by reducing neuronal hyperexcitability.