I've read an article about the medicinal properties of cannabis roots recently...they don't contain cannabinoids, but they DO contain other beneficial substances. Some terpenes found in the root are thought to have a humectant, expectorant effect, which may benefit those suffering from bronchial illnesses. One terpene in particular (friedelin) has been definitely identified in hemp root, and has been found to be anti-inflammatory, antipyretic and analgesic in effect. Hemp root has also been found to contain other alkaloid groups known as phenolic amides and lignanamides, believed to have anti-inflammatory and analgesic effects. There is some suggestion that two alkaloids present in hemp root, Cannabisativine and isoCannabisativine, adversely affect the central nervous system and are hepatotoxic (toxic to the liver). However, some research points to the existence of spermidine in these alkaloids, which has anti-aging cellular properties and may also benefit those suffering from Type II diabetes. Research into this has been limited, and it is unclear if there is an entirely safe method of ingesting hemp root extracts. The pure, boiled extract should not be taken internally, although a tea boiled for less time, as previously stated, may have beneficial effects. A 2008 study performed at Leiden University in the Netherlands, which processed hemp root with various different solvents to extract the active ingredients, found the resulting substance to be a mixture of lipids and sugars, with some other compounds mixed in. Although they acknowledge that the procedure led to various constituents being destroyed, they did discover the presence of a glycoside, a type of organic molecule that can helped to eliminate poisons from the body by binding with them chemically and rendering them inactive.
One cannabis salve recipe describes breaking up the root-mass into small chunks, then placing it into a slow cooker with water and oil in a 3:1 ratio (e.g. six cups water, two cups oil - an effective way to dissolve the active ingredients in the oil without 'frying' them), and leaving it to simmer for 12-14 hours, making sure to add water if it begins to dry out. The mixture is then strained and frozen; the oil is poured off the ice it rests upon and heated gently with beeswax until the desired room-temperature consistency is achieved. It is also possible to experiment with various other ingredients, both during the initial boiling process - where leaves and barks such as sage or cinnamon could be added - and during the final mixing stages, where it would be more advisable to use extracts and essential oils. This recipe is said to be highly effective at relieving muscle and joint pain, stiffness and spasticity when applied topically.