Well, it was some time ago, nowadays most of the abusable methylphenidate analogs are scheduled in Canada. But back when they were around, I ordered some on a whim during one of my once or twice yearly RC purcases, along with 3-FPM. The justification was it seemed the most potent stimulant of the availiable analogs - at the time I believe there was 4-Me-methylphenidate (which was actually less potent than 4F-methylphenidate if I remember right - so I didn;t bother ordering any), ethylphenidate, methylnapthidate, and I think ethylnapthidate too. Out of all of them the only one I did not try was 4-Me-MPD. Ethylphenidate wasn't too impressive as a stimulant but was active. The napthidates has poor solubility in water so I didn't ever go past the inital small sample I ordered for those.
4-F-MPH turned out to be a quite useful drug, very potent, I would be lying if I did not have some good fun compulsively redosing on 5-10mg boosts of it every couple hours. It did have a comedown but not anywhere near as sharp and rapid as "regular" MPD. The effect seemed to me to be quite clean and functional though there was also some euphoria present, but not like massive waves of pleasure, more like a general sense of contentment and focus.
I also gave some to my close friend, who took to IVing doses of 20-50mg, possibly more, if I'm remembering right. He loved his stimulants, found it easy to redose on, and quite euphoric as well as functional. Same type of guy to go through a hunddred dollars of crack in a sitting, or habitually redose on meth (worst with IV than with smoked he says) He claims to be absolutely wrecked after even moderate doses of Ritalin thanks to the comedown. For whatever reason and against all logic, he found 4F-MPH (which is supposedly about 30x more potent than methylphenidate - meaning 50mg 4FMPH comparable about 1500 mg MPH (!!!) - yet the experience, even with repeated usage over many days, produces almost no crash at all. He glides gradually to baseline and can actually sleep - once he decides to stop taking redoses that is! It does have somewhat of rhe usual diminishing returns from repeated use, but in our limited and unacademic studies we found it was pretty reliably euphoric and stimulating even after multiple redoses. (Not suggesting that tolerance doesn;t happen, but it seems to be superior to crack or methylphenidate when considering the potential utility gained by redosing - people find themselves wanting to redose crack even though they are already $BIGNUM into a binge/"mission" and they are literally just going through the motions, increased doses provide seemingly no effect, and you're seemingly stuck in a loop. I think the qualities of 4FMPH make these sort of scenarios less likely, howver the corrolary is instead the potential to end up horribly overstimulated, fearful, confused, tachycardic, and/or hypertensive could be more likely.
It "ended" the day we ran out of material between the two of us. By the next time I had an oppotunity to fritter money away on drugs, Health Canada had decided to be party poopers and ban most analogs of MPH. No addiction or dependency experienced for the sample of 2 people.
... and somehow, 3-fluorophenmetrazine remains uncontrolled. No fucking clue why, but I'm not complaining...
I found the 3F-phenmetrazine to be somewhat more enjoyable/recreational, yet have a slight preference towards methylphenidate (troparil is even better IMO). My friend found 4FMPH to be most enjoyable, and yet he prefers amphetamines. Super strange.
