I would start small and use only the real raw root, not the extracts/pills/etc... 3g of raw root is probably a safe starting dose, wait at least an hour before drinking more, it hits you slowly... you don't want to over do it, it has 9 hour half life so if you fuck up, you could have a bad trip lasting for hours...
it's probably best not to do it too often, it has been reported to be hepatoxic, some liver failure deaths have been linked to it, so go easy with it, I would aim for not more than once per week...
if you see your skin turning yellow or if you get abdominal pain, then you are probably fucked, your days are numbered, great time to visit your priest and to tell your family you love them...
