4f-mph means 4 fluorine-methylphenidate. So it is a variant of methylphenidate that is similar in effect, except it is both more potent (careful dose measuremen

4f-mph means 4 fluorine-methylphenidate. So it is a variant of methylphenidate that is similar in effect, except it is both more potent (careful dose measurement needs a gemini milligram scale) and has a much much longer half life (once early in the morning) the fluorine is toxic in theory except its supposedly not toxic because the bond that bind fluorine to methylphenidate is one of the strongest bond in chemistry. That's why ~40% of new FDA allowed drugs use fluorine. But it can slighly alterate the binding ratio of dopa vs noradrenaline vs sert. You can buy it e.g. here https://rarechems.com https://rarechems.com + /4f-mph-hcl it has been tested by third party labs cf https://rc-scene.com/ https://rc-scene.com/ the legal status depend of the country but yeah there is a cardiotoxic risk. I would combine with Cialis 2-5mg daily since it is a potent cardioprotector and cancel vasocontriction also I advise you to take your stim 5 day per week max, otherwise you risk building tolerance. 5 days per week might be too frequent for 4f mph, I don't know. And it's too potent to be mixed with selegiline or moclobemide.