Coleus is a plant from the mint family. It grows in tropical regions of Asia such as Nepal, India, and Thailand. The root is used as medicine. Coleus root contains a chemical called forskolin. Herbal product manufacturers often produce coleus extracts that contain high levels of forskolin. These preparations are being promoted for the same conditions for which forskolin has been traditionally used. Coleus or forskolin are used for high blood pressure, chest pain (angina), asthma, dry eye, and many other conditions, but there is no good scientific evidence to support any of these uses.