Since when is there a 1.5 hours rule? I have always found that PRN / as needed dosing was the best, but then again I know my body, and I guess some people might not be as in touch with theirs, but I also am extremely careful about what I put into my body, I always have had to know everything or as much as I could about a drug before I took it, and I always preferred crystal MDMA rocks instead of pills because pressed pills post 2008-2009 IMO went to shit. I don't know, just my $0.02, ecstasy was the compound I probably overdid out of them all. I don't think I have any serotonin and I haven't so much as thought of taking MDMA in a long long time. I just don't ever think of it even as an option despite it being extremely readily available. Not my cup of tea anymore, you lose the magic and then end up chasing that first high like they always said you would, and if you were a dumb mother fucker like me, and took tens of thousands of hits over their MDMA-using period of their life, you probably can relate to what I'm saying... But I don't know, I just wanted to mention the part about 1.5 hours and where the hell that figure came from, no one's body chemistry is universal so there's no magic number that can be applied to everyone.