NMDA antagonists prevent calcium eflux--this a mechanism by which tolerance to dopaminergic drugs is acquired.
Ca2+ and Na+
influx, K+
efflux. I suppose you know this, but thought I'd mention it in case anyone else reads it.
I'm pretty sure crOOk figured it out here in the thread somewhere. Back up a few pages or search for it. I'm not an IV-guy myself so I don't know the terms. But I'm pretty sure it was either crOOk or someone else who figured it out. Should be here somewhere =) Be careful, someone had some tissue damage from using a strong mixture (not sure if that's the correct term but I'm pretty sure you know what I mean

).
That was indeed me. Same guy who had to find out that our connective tissue seems to react quite violently to 3F-P.
The safest concetration was found to be 35-40mg per ml
Yup, that's correct. 43mg/ml is
too much and would cause reactions to extravasate with the inflammations leaving behind subcutaneous fibrosis.
Regarding the question about osmolarity and pH. Osmolarity is not a major issue, at 40mg/ml the solution will be hypoosmolar (unless you use NaCl solution which comes at physiological osmolarity and should be avoided!). You could theoretically use NaCl to adjust osmolarity to 300mOsm/L, scroll back to find the exact amount, I'm not doing the math again. As for pH, the salt will not affect the solutions pH, at least not significantly so. This assumes there aren't any impurities which would have an effect on pH. I have had 3F-P from 3 sources and none of them did contain any though.
God it's been more than a month and I just can't forget about this fucker. I heard someone say the word 'three' today and was immediately overcome by vivid memories of the 3F-P rush. I push the plunger, my heart starts beating harder, faster, blood boiling, breath freezing, heart beating harder yet, boom boom boom, soon overshadowed by a thousand ringing bells and then: Silence. My body freezes, my mind becomes still. Time stops for a moment.