This document discusses the medicinal uses of tobacco. It notes that tobacco is in the Solanaceae family and the leaves and dried cured leaves are commonly used. Tobacco contains nicotine and other constituents. While smoking tobacco is harmful, the document outlines several traditional medicinal uses of tobacco leaves and nicotine extracts, including as a sedative, expectorant, insecticide, and treatment for toothaches, skin rashes, and snake bites. Some research also suggests nicotine may help treat neurological disorders like Parkinson's and Alzheimer's diseases in small doses. The document concludes by noting tobacco is an effective natural insect repellent for gardens.