That is so strange to hear. I have been taking Viviscal for over 18months now and have not experienced any of the symptoms that you mentioned above. I have also recommended the product to countless people and they have had nothing but good things to say. Once the initial 6 months were finished I have dropped back to one tablet/day and have found that this is just enough to keep my hair and nails healthy and strong.
I remember from when I originally looked into Viviscal that they said you shouldn't take it if you are allergic to fish or shell fish.....could this be a factor for you?
Have you tried to stop taking the tablets and to see if the headaches etc go away?