I agree with Acherusia. Every plant in the Nightshade family (Solanaceae) is incredibly toxic. The toxins include Solanine, which has a lethal dose of about 4 mg/kg bodyweight. That means, a healthy human being weighing 75 kg, would die if he ingested 300 mg.
They also contain various Tropane (also toxic alkaloids), but these vary with each genus. However, some of these can actually be absorbed through the skin, causing anything (depending on dosage) from mild irritation of the skin, abodominal pains, hallucinations to coma and death.
Bonus info: The name "Tropane" comes from the plant Belladonna (Atropa Belladonna ), where these alkaloids were first discovered. Atropa is named after the Greek Fate Atropos who was said to cut the thread of life. That is how toxic it is.