Wormwood, as you may be aware, was originally used to flavor absinthe. Yes, it includes thujone, a chemical that, in extremely high amounts, can induce convulsions and death, but the concentration found in absinthe will not cause you to hallucinate. Thujone is also found in some other herbs, such as chamomile and rhododendron flowers. These plants do not contain enough thujone to be toxic. Wormwood, on the other hand, can be harmful if consumed in large quantities over a long period of time. The amount of thujone in wormwood varies depending on the species and how it is processed. The best way to avoid any risk of poisoning by thujone is not to consume any part of the plant. If you are still unsure about whether wormwood is safe for consumption, then there is no need to worry about it. This herb has no known health hazards for humans at normal exposure levels.