“Crotalphine is an antinociceptive peptide… we evaluated the involvement of the peripheral cannabinoid system in the crotalphine effect and its interaction with the opioid system…
Crotalphine-induced antinociception involves peripheral CB2 cannabinoid receptors and local release of dynorphin A, which is dependent on CB2 receptor activation.
These results enhance our understanding of the mechanisms involved in the peripheral effect of crotalphine, as well as the interaction between the opioid and cannabinoid systems.”