I take wormwood for intrusive thoughts. They are gone. I only take one a day, but the dosage calls for more. The brand I use is a Wormwood Combination with Black Walnut leaf (Juglans nigra), Wormwood herb (Artemisia absinthium) Quassia (Quassia amara), Cloves (Syzygium aromaticum) and Male Fern root (Aspidium filix-mas). I also took Lithium Orotate and it was very good, but the Wormwood is better. I am 65 years old and have had depression problems. That seems better but the anxiety and OCD seems to have kicked in. I was never bombarded with the intrusive thoughts until later in life. I will never be without Wormwood again.
Just read the article connecting the low level of zinc and elevated copper with anxiety: http://www.naturalnews.com/041890_chronic_anxiety_zinc_levels_copper.html