With reference to the 25I IV dosage question, I can confidently state that 600mcg is way to much to deal with for a couple of hours having dosed at this level in error. Though the visuals were beyond description and will stay with me for life. I wouldn't choose to repeat the body load which combined with accompanying debilitating mental confusion left me capable of nothing more than lying down eyes shut for the first two hours but this passed and was functional an hour later at which time I got up and about to appreciate the still very pronounced morphing visuals which by this time had diminished considerably. from their peek but still a delight all the same. The visual morphing of objects was at it's peek, beyond comprehension and meaningful description. I certainly experienced something exceptional that short of taking another overdose another overdose, I'm not likely to ever equal.
As you will no doubt be aware, tolerance builds at a substantial rate so Was not really surprised to find that the third of original dose being 200mcg taken 9 days later produced some dose conducive physical side effects but visual activity was not present so there's the tolerance exerting a strong influence already.
11 days after the second dose I IV'ed 400mcg. Physical side effects were much more pronounced than on 200mcg but were not unpleasant but felt a bit restless and a bit lifeless and lethargic for a wee while. Visuals were fairly subtle for the most part except when viewing computer monitors, text messages on mobile phones and the woodgrain effect of the laminate flooring which all produced very clear visual morphing.
Do bear in mind that the effects of the dosages on the second and third occasions would have been strongly influenced by that excessive first dose. So don't base to much judgment on those results.
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Well I don't know if the above is in anyway helpful but if one thing it shows how one experience will have a lasting effect on tolerance.
My original intended dose was to be 300mcg which I still feel would be a viable starting point though I suspect that 200mcg would provide a gentle if underwhelming introduction to this amazing drug..
Good luck with whatever course you choose to take. By the way I was amazed at how forgiving this drug is considering my initial stupid dose and the overwhelming takeover it did on me for the first and seemingly timeless few hours. I was left with no negative after effects of any kind. Pretty impressive I'd say. By the four hour mark I was feeling on top of the world and the feelings of confusion and the early feelings of being totally overwhelmed to the point of helplessness had faded to the point of irrelevance quickly leaving a positive happy and in my case a somewhat euphoric feeling in their place.
Maybe you'll gain something useful from this that helps at least in some small way. Just remember that underdosing is almost as important to avoid as overdosing from an enjoyment point of view though not where safety issues are concerned of course. Taking too low an initial dose will not produce memorable results and redosing in the hope that it will improve the experience will make no difference to the level of the effects but will only serve to extend the duration of the experience as it stands.
Happy tripping