Role in the film
This ingredient is used by Sally to put Dr. Finkelstein to sleep after she poisoned his Worm's Wort Soup. She then attempted to hide the odor of the Night Shade with Frog's Breath. When the Frog's Breath repelled the scent of the Night Shade, it made the soup bitter so Sally used Worm's Wort to freshen up the soup and make the soup taste better.
Deadly Night Shade causes a person to fall into a deep slumber after consuming it.
In the film