Oh yeah, I know quite a bit about brugmansia being used as an admixture plant for south american ayahuasca ceremonies, it's actually called Toè there, but yeah ayahuasqueros/shamans/curanderos sometimes will use it in small small quantities with the main ayahuasca brew [banisteriopsis caapi & psychotria viridis].
It's dangerous to do though due to the MAOI properties of the b. caapi vine in combination with the anticholinergic deliriant properties of the brugmansia.
It's also used in several other preps, though they're sort've off shoots.