Hi all! I thought I was going crazy too. I'm only on day 4 of my first pill pack and for the last 2 evenings (and rght now) my heart pounds and my hands feel tingly/numb, plus I feel very anxious inside and I haven't felt that way in YEARS!! I am on thyroid medicine and just called the pharamcist to see if there was an interaction between the two....nope, she says... This has been the only change. I have been on potassium suppliments but haven't taken them as regular as before. I stopped when I read there could be an interaction. Thoughts???