Is there such as thing as taking to much B6?

My m/s is starting to kick in badly and the chemist told me to take B6 and Travelcalm.

My preg vitamins already contain B6.

So can i take my vitamins, plus another pill of B6 (along with Travelcalm)?

So thats 2 preg vit tabs a day with B6 and a B6 tab on its own!