Is Bittersweet Poisonous To Humans?

Is Bittersweet Poisonous To Humans? Toxicity. Although this is not the same plant as deadly nightshade Is Bittersweet poisonous? The entire plant is harmful to the animal when ingested, but the berries are the most toxic. American Bittersweet is a climbing vine type plant containing simple serrated leaves and small yellow/green flowers that bloom and