Pawhuskin A – selective; naturally-occurring[37] (kappa antogonist)
http://en.wikipedia....tor#Antagonists
Pawhuskin A is a naturally-occurring prenylated stilbene isolated from Dalea purpurea which acts as a competitive silent antagonist of the κ-, μ-, and δ-opioid receptors (Ke = 203 nM, 570 nM, and 2900 nM, respectively)
http://en.wikipedia....iki/Pawhuskin_A
Purple prairie clover provides food for a number of animals, such as pronghorn. It also grows in cultivated fields and becomes included in hay for livestock. It is nutritious and is "considered one of the most important legumes in native grasslands on the Great Plains." It also had a number of uses for Native Americans. The leaves are edible and good for making tea and medicines, and the roots are palatable when chewed.
http://en.wikipedia..../Dalea_purpurea
Being an antogonist at everywhere, no abuse potential. Perhaps, no risk of being regulated.
Is it safe and practical? What do you think?