@Sturnam
This link tells the story of someone who used Methylone routinely for a few years (take note, this is
not a link about MDAI per se, just one of the other RC entactogens with similar effects but using different receptor affinities).
Here's what he has to say about repeated usage:
My experience with MDAI is that it is indeed weaker than Methylone. But calling the two simply dissimilar would perhaps be more truthful. More than anything, it is an effective antidepressant (with a little erotic aspect to it) that doesn't interfere with cognition.
I've been treating it as a "work hard, play hard" aid and have been splitting my weeks into two halves:
3-4 days in a row: Follow a Nootropic regimen (Alpha-GPC, Fish Oil, "Chocamine", Piracetam, Oxiracetam, Bacopa Monnieri, Huperzine A, L-Deprenyl, and sometimes Rhodiola Rosea), and study harder than ever before in my life. I saved up enough money to keep my rent and bills at bay for a couple months, that I may have the time I need to finish coding an approximative Physics/Chemistry/AI hybrid engine project of mine, built for modern GPGPU massively parallel processors. During these days, I mercilessly push my creativity and concentration to their limits.
3-4 days in a row: Take ~60mg MDAI as a base early in the day. Read a good book, go out and have a good time, watch a favorite show, whatever it takes to enjoy life to its fullest. I find the experience of threshold level MDAI can feel so subtle and non-drug-like, that if you're truly enjoying your hobbies and general life around you, those empathic feelings of peacefulness and tolerance in all things last pretty much the entire day.
All the while I eat healthy including whey protein, antioxidants, normal levels of multivitamins (not those silly 1000% RDA messes), and sleep fitfully.
Between these two extremes, I've never felt more balanced and capable. Before taking this measure, I had been getting frustrated over the little things in life, and my programming project was therefore running into obstacle after obstacle. Uncertainty and despair at my personal limits had begun taking its toll. I was frequented by thoughts of self-doubt, a decline in motivation and general lack of focus.
After nearly 4 weeks now of this, I've worked my way around every tight spot I had coded myself into with the Physics chunk of the engine, and haven't heard a peep out of those old, obnoxious negative thought-loops we all sometimes fall into.
The only trouble I've had from this regimen is that I end up sleeping 10 hours a day, as by the end of each day from either half of the week I'm completely...
completely exhausted. But in a satisfied, self-assured sort of way. And every morning I wake up full of energy, eager and grateful to just be alive.
The time I spend away from MDAI I do not desire taking it in the least.
I think I'll try a month without any MDAI at all now, to see what comes of it. As has been suggested before, a low-low dose of L-Deprenyl (2.5 mg once or twice a week) seems to keep away post-entactogen depression, as I've never experienced any unpleasant after effects.
Then again, I'm usually too busy with work to care by that swing of the pendulum, so perhaps that has more to do with it than anything.
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If there is any substance I would like to see studied and recognized as a Nootropic or obtain legitimate antidepressant prescribability status, it would have to be MDAI.