I've just concluded it's more difficult to dose psilocybe truffles than mushrooms. The psilocybin content in the former is wildly inconsistent. I had two experi

I've just concluded it's more difficult to dose psilocybe truffles than mushrooms. The psilocybin content in the former is wildly inconsistent. I had two experiences, shared with a friend, spaced months apart using the same variety, vendor, dose (strong) and preparation method- The first was overwhelming and mystical, the second left us struggling to identify any effect beyond placebo. I spoke with the very friendly shopkeeper afterwards, also an avid psilocybe user, and she has also concluded sometimes they're just duds and prefers mushrooms for that reason. In your case, you got a scarier surprise as I guess you had the order reversed. To respond to the somewhat rude "don't come to Amsterdam and do drugs if you don't know what you're doing" post: You have a strong psychedelic substance being legally sold with totally unknown strenghth (as 'grams of truffles' doesn't count). What could go wrong? These products definitely need better labelling. I've also seen ridiculously strong pot edibles being sold in Amsterdam with insufficient labelling, but I digress. This particular doseage mistake might not have been made if mushrooms were legally available as their psilocybin content is much more predictable. ("I did X grams last time and that was fine so I'll do X grams again!" is mostly reasonable) The problems are exacerbated by prohibition.