Wormwood powder is used for various digestion problems such as loss of appetite, upset stomach, gall bladder disease, and intestinal spasms. Wormwood is also used to treat fever, liver disease, and worm infections. People also use wormwood for Crohn disease, a kidney disorder, osteoarthritis, and many other conditions. Take 1 tspoon of the powder three times a day for seven days. Feel free to take it with a pure juice for the bitterness. Using wormwood for longer than four weeks at a time is not recommended.