1,534 Black Nightshade Leaf Medicinal The plants are used as an emollient and analgesic to treat itch, burns and neuralgic pains, and are also considered to be expectorant and laxative. The leaves are said to have sedative and healing properties and are applied to cuts, ulcers, wounds, inflammations and skin diseases. An extract of the leaves and stem is used for treating dropsy, heart diseases, piles, gonorrhoea, fevers, eye diseases and chronic enlargement of liver and spleen. 8,500