Salvinorin A from the hallucinogenic mint Salvia divinorum reduces facial nerve pain in mice through cannabinoid and vanilloid receptors

Salvinorin A, the main active compound in the hallucinogenic mint Salvia divinorum, reduced formalin-induced facial pain in mice and appears to act through cannabinoid type 1 and TRPV1 vanilloid receptors. Both a concentrated plant extract and purified salvinorin A decreased face-rubbing behavior, while receptor blockers eliminated the effect. An isolated rat nerve and esophagus preparation provided additional evidence that the compound suppresses nerve signaling through these pathways. Pain-relieving doses did not significantly affect anxiety or motor coordination, but treated mice showed reduced activity, including more immobility in a forced-swim test and less exploratory rearing, suggesting sedative or depression-like effects. The findings offer a biological explanation for Salvia divinorum's traditional use in Oaxaca, Mexico, but remain limited to animal and tissue experiments. Further research must test nerve-injury models and develop compounds that preserve analgesia while reducing psychoactive and behavioral side effects.