Drug preparations administered orally produce an increase in gastric secretions and bile , mainly due to the bitter principles , which stimulate both lingual bitter taste receptors as found in the mucosa of the gastrointestinal tract . They have an appetite stimulant and digestion -promoting action.
Wormwood preparations are contraindicated in case of hypersensitivity to the drug or other plants of the Asteraceae family. Also, in case of biliary tract obstruction , cholangitis and liver disorder , as well as during pregnancy and lactation . Thujone has a stimulating activity of uterine contractions .