ETmtl- I have been using Wormwood for a few years now. I have never had any problems or my hubby who has used it the same way. Wormwood is deadly to worms. I worried more about having a serious infestation then I have ever worried about Wormwood being toxic. I really don't think it is a problem used in the amounts that are in the recipe above. Same with the cloves. It is the clove oil that can cause problems.
This recipe works for so many different infections. Which so many of us have today.