The uses of Deadly Nightshade are as follows:
Cosmetic - Used by women, an extract of Deadly Nightshade was put in an eye drop and then dropped into the eye, making the pupil dilate. This usually makes a woman more attractive.
Recreational - People may make tea out of the leaves, the experience from the plant is usually long (12 hours up to 3 days) and is similiar to Datura, Dipenhydramine and Benadryl in effects. The effects include vivid hallucinations, dry mouth and general feeling of being poisoned.
Medicine - Deadly Nightshade can provide Atropine which can be used for an antidote for cholinesterase inhibitors and nerve gas used in chemical warfare. It can be also used by optometrists to dilate the pupils for eye examinations.