A quick Google search throws up instance of people buying medicine on-line which contains arsenics. Is this not similar to how we get fake English medicines. I do not see any source which says that ayurveda advocates adding this. Can you link me to some relevant source?
I have been using medicines from arya vaidya sala one of the trusted ayurveda centres in India and never heard or had any issues.
That is scary... the website for the medicine I use seems to stress that it uses herbs over metal or minerals. Hope they are safe. But the fact that there is no central body which can check and authorise these medicines is a cause for concern.