 However, considering the close similarities between ethylphenidate and methylphenidate and the fact that methylphenidate, like cocaine, actually does not primarily act as a "classical" reuptake inhibitor, but rather as an "inverse agonist at the DAT" (also called a "negative allosteric modulator at the DAT"), it is at least very likely that ethylphenidate also primarily acts as an inverse DAT agonist instead of (or at least only secondarily) as a classical reuptake inhibitor (which could be called a "competitive antagonist at the DAT" using a similar terminology as "negative allosteric modulator at the DAT", which per definition means that its mechanism is non-competitive).There have been anecdotal reports of a perforated septum resulting from even just a few uses of ethylphenidate by insufflation (snorting).Some users also report the drug is extremely painful to insufflate.