- serafina -
Personally, although I smoke santa maria only shamanically and quite rarely, I don't find there is anything wrong in smoking it. Sure enough much of it around is quite lethargic. Is it him or is it you who want him to stop?
Anyway, there's a root from Africa that he might try, Iboga, in english it is called Ibogaine, it heals addictions even of heroine and cocaine, he might try it. It is a bit expensive, but he wouldn't need to make many sessions of it, one might even be enough. Understand that until you remove the spiritual reasons of an addiction, if addiction that is, you can by force of will get separated from a substance but the unbalance stays with you.
Same same with ayahuasca, which is a cocktail of a vine, ayahuasca, and leaves or roots containing DMT, be it chacruna, chacraponga, mimosa, or others. Ayahuasca would put him in relation with himself and face the spiritual reasons of his addiction, like Iboga. It is a wonderful and VERY challenging plant. There's a center in Peru called Takahuasi, where they heal addictions with ayahuasca. It takes a bit more time, which isn't waisted anyway because he would be doing life-changing shamanical work on himself. Unless you're already into plants, you wouldn't be able to prepare the brew of ayahuasca, and the tradition is to always relate to a shaman, so the people of Takahuasi have several shamans colaborating with the center.
Anyway, as I said it, I wouldn't wrong it too much. It's not that bad. If your BF has problems, maybe the reasons are other