Hi, I have done something very stupid. I was suffering from severe allergies and was not satisfied with the regular medication (antihistaminca, nasal sprays, saline rinses etc). I looked on the internet if there were any promising supplements that would help suppress my allergy symptoms (inflammation of sinuses, a lot of saliva, agitated, not sleeping well). I came across butterbur+feverfew. It seemed promising and I thought I would give it a try, because I desperately wanted to feel better. I ordered the product online. The product worked remarkably well. When I took a few pills, the effects became apparent after 1 hour or so. I could concentrate better and the throbbing in the sinuses went quiet. I was super happy. The bottle said: use 1,2 or 3 caps daily. Because my allergy was so severe, I took about 30 per day. Yes, I know, way too much. Really stupid that I was willing to take such a big risk, but it felt great for about 6 weeks. I took 15 in the morning and 15 in the afternoon. I slept fine and just went about my days without worrying about my health and I even completely forgot I had an allergy at all. After a while however, I thought I was experiencing hearing loss and my hands started shaking. I didn't realize what was happening and kept taking the supplement for 3 weeks more. I started having heart palpitations and my coordination was decreasing. My ears were ringing and I was disoriented. I finally made the connection to the supplement and stopped taking it. After two days I noticed a significant recovery. My head became clearer my hands became a bit less shaky. Right now, it has been 12 days since I stopped. My hands still shake en my arm movements are still not very fluent. I'm so clumsy. (I'm only 24 years old). What had happened? I cannot find any record of butterbur having this kind of effect. Can feverfew cause this? Was the product contaminated with heavy metals? Did it contain pesticides? How reliable is NOW foods? Did someone else have this experience? I looked at their website and it seemed relatively safe.