I'm still in the grip of this stuff - I made a very, very stupid mistake and rectally administered 30mg rectally; I thought it was opium/morpine soln. The bottles I keep them in have a very similar appearance (the opium soln is just short of colourless - mixed opium alkaloids would be a better description and the label is only written on in pencil, so by not thinking, I ended up squirting a HUGE dose into my arse).
I don't think the rising tide of panic was too helpful after I realized what I'd done - basically a prolonged panic attack. After 5ml of GBL (I have little to no tolerance) I was calmed down a bit, but not so much as to take away the feeling that I might have another panic attack (5ml of GBL should have wiped the floor with me). When that started to wear off, I had 30mg of diazepam at 11pm and I'm still uncomfortably awake now (just gone 5am), but at least it doesn't feel that I' (too) likely to have a heart attack.
So for all you people out there considering this stuff - it is extremely potent, and like really large doses of speed/meth or coke, large doses are the 7th circle of anxiety Hell. It also totally fucked up a film I was really looking forward to seeing (Reign of Fire). Anybody careless with their use of this compound could very well be booking themselves a place in an A&E or psyche hospital. I have a reasonably high tolerance to amphetamine, yet it scared the shit out of me - I haven't had a panic attack for about 16 years now; considering the way the memory links objects with emotions (MDPV and overwhelming panic and fear), I'm pretty certain I'm done with it.
PS.
over the course of 8 hours 200 mgs of MDPV was consumed.
I'm sorry, but 200mg over an 8 hour period would put you in hospital. Without wanting to shout 'J'accuse' at your post, I can't believe you took that much without nearly dying/having a communal panic attack. Are you sure it was MDPV and not methylone, and/or are you sure of the weight you consumed as in my experience (and reports from others), 200mg is an extremely unpleasant ride, and doesn't let up at any point. It also seems to produce a very strange CEV effect at large doses - a bit like a cross between 2C-I/ other 2C-X's and MDA.
Be extremely careful before putting this stuff into your body - I can say with conviction that I don't want to see this stuff ever again