Belladonna

Belladonna, or wolfsbane was a poisonous herb known to cure lycanthropy. It was known to be also toxic. Anyone eating belladonna was likely to find themselves weakened physically.

Uses
If a victim bitten by a lycanthrope ate a sprig of belladonna within an hour of the bite, he or she had a chance of not contracting the disease. The belladonna, however, had to be relatively fresh, not picked any later than a week ago.

Though consumption of belladonna worked equally as well for giants and giant-kin infected with lycanthropy, they needed to consume much larger amounts than the smaller humanoid races.

Belladonna was used as a material component in the casting of the spell protection from poison. It was also used in gas bombs invented by the lycanthrope-hunting organization known as the Silver Stake.

Locations
Belladonna was known to grow on this small, Isle of Balduran, in the Trackless Sea