Generally the basic cubensis type, roughly 3g dried is considered a single dose, others are usually more potent. What I did (I think I've read it on erowid), wa

Generally the basic cubensis type, roughly 3g dried is considered a single dose, others are usually more potent. What I did (I think I've read it on erowid), was to mix dried shrooms with pure fresh lemon juice. The result is properly disgusting (too sour and shrooms taste horribly and shrooms brought me almost to vomit), BUT - it makes the trips shorter (say 3 hours instead of more exhausting 6) and much more intense. What OP describes with "really high doses", well, I went beyond with those 3g, not sure how much further. But there are few 'tricks' to make it happen. 1) be alone (so not good for those who are anxious and on first trip), so that nobody interferes with the experience and you can just go deeper and deeper if you want; 2) close your eyes, ideally laying on the couch/bed, having some relaxing soft music as a background (I had some shamanic sounds which were positively adding to the experience I believe). Visual sensory input and managing of the body is too strong for the brain to ignore, it will throttle the trip significantly. After some time, losing gradually all my senses, losing any mental connection with all parts of the body, I ended up as a mist of atoms, egoless, just watching from distance, swirling in the music that was playing in the background although I didn't hear it directly (weird, I know, hard to describe). Imagine hot steam sauna, if you have light there you can see droplets swirling. What was also impressive was coming down, since the process of re-discovery of my physical self, be it hand or breathing or eye muscles was more pronounced compared to losing it, one at a time. This part took easily 30-60 minutes if uninterrupted. And at the end the utter sense of peace with all universe. I am not spiritual/religious and this didn't change that, but I understood back then where religions come from and why they tell us more about ourselves rather than god itself (but that's my own conclusion). Profound, 1 in top 3 most intense experiences in life, repeatedly (didn't do it for last 10 years though, kind of took from it what I needed and could I guess). Mind you, at any time, I could interrupt it and stand up, losing 90% of the current state. Maybe on higher dosages this wouldn't be possible so easily (but they say vitamin C or sugar terminates the trip pretty quickly, not sure never needed it). Also, having issues, anxiety, going though harder parts of life ain't a good combination with any mind-altering drug, or any drug for that matter.