From a poster on another forum.
Yeah, sweetspice or spicebush.
Have to watch that one because there's a yellow one that goes by spicebush, too, and the "nut" gets used for an allspice (lindera vs. the calycanthuses).
A lot of the medical uses counteract something or interact poorly with common meds, so do a LOT of research if there are preexisting symptoms, unrelated symptoms, and other medications are already in use. The calycanthine alkaloid is related to strychnine - good and bad aspects - so know it ahead of time and trial in small doses. With all the contraindications, it's not one to leave on a list/chart to test the first time in an already-emergency situation.
Like, the fruits also got used as pest poisons by some of the natives.
The twigs also get used for flavoring tea and heavy wines. Easterners have tons of other options that are even more numerous and common, so neither of our predominant vars get used for it as much, but in the west, their native var. .occiidenttalis got used for sieves, herb drying racks, woven baskets, arrows, their version of wattle, small cages, stuff like that.