i heard cocaine is more cardiotoxic than amps, they are more neurotoxic... sure not easy on your heart still but not toxic like cocaine or propoxyphene the opiod is cardiotoxic...
i stay away from coke because of impurities, a shittier high IMO, and the whole cardiotoxicity thing...
I'm more acquainted with dexamphetamine.... but no speeding heart is good par se...
I just feel safer with prescription drugs knowing how much I'm fucking taking... as opposed to like saying my drugs are only 20% and you get them from some dealer who does not know unless he made the shit either... its like "this is fire shit bro" wtf is that? I don't go with dex calling it fire shit snort this.... its Xmg, or Xmg... lol.
anyways... yeah thats all completely irrelevant sort of...
the racing heart from methylphenidate is mostly caused by the racemic mixture, giving you half dex and half levo methylphenidate... levo isomers of stims cause more unwanted speedy less euphoric effects...
focalin is probably way more kickass in comparison as its only dexmethylphenidate...
in terms of recreation the isomers mean everything...
upon swapping to dexamphetamine it allowed me to dose waaaaay higher than I thought I would need or be normally able to in adderall and even shitty extended release formulations cause some unwanted effects... the dex in dimesylate salt vyvanse dex or even if the levo was in there (sure it would still blow more) it still has unwanted effects...
the salt and isomer is everything... seriously. in terms of side effects and recreational potential.
thats why people hate on adderall... methylphenidate racemic mixture would be 10x as bad as that too...