If potassium Iodide can kill, then a whole lotta folks on the Iodine support forum would be dead. I do 8-9 drops per day with no fear of death - in fact it has helped tremendously. parasites are not my only issue, but showed their ugly selves to me when I was very ill, immune extremely low, menopause, head injury, etc. I would love it if they were all gone but I know it takes time and working at it. That which has taken up residency a long time ago may not be eradicated quickly. If they are in my brain I would, of course, not feel that, but they are beneath the scalp - unless this noise, inflammation, itch, and movement is something else altogether. I am assuming from my research there is a high possibility that parasites have scattered to my head.