Yeah that's part of my concern though, since those places exercise an extremely low degree of pharmacovigilance -- which refers to the extent to which the medical and scientific community monitor for adverse drug reactions. In other words, clobenzorex is used almost exclusively by third world latin american countries, which do a really bad job of connecting the dots for these sorts of things. Not only that, potential damage would resemble heart disease, which is common there in even fairly young patients due to epidemic rates of obesity. So it could easily fly under the radar.
There are a few case reports in mexico of pulmonary hypertension and cardiomyopathy associated with long-term clobenzorex use at not particularly high doses, and almost certainly there are many more. Again, the doses involved weren't that high which sort of rings some alarm bells.
As far the mechanism of its cardiotoxicity I was able to find this:
Overall, clobenzorex definitely feels quite a bit different than dextroamphetamine (for which it is a prodrug), and even feels different than delayed release dextroamphetamine (ie, dexedrine spansules, which I took for a long time).
Specifically, clobenzorex feels more physically stimulating in some ways, makes me feel like cleaning, which is something I don't feel like doing on dexedrine or adderall, even on much higher doses. I feel like cleaning on meth however. And it isn't as clear minded as dextroamphetamine, having some fuzziness to it, not that same kind of nootropic-like lazer focus.
And weirdly, I notice a slight tinge of paranoia with clobenzorex at higher doses (180mg+), which is something that never happens to me from even significantly higher equivalent doses of dextroamphetamine.
Still, it's not bad in a pinch, I've been using it when I run out of dextroamphetamine (in fact I've had 180mg in total today, ie 6 capsules). I do not recommend doses this high, and am not convinced it is safe to do so. In fact because of my concerns I'm actually going to get some 2-FMA to use in place of this stuff when i run out of dextroamphetamine, because funny enough I feel more comfortable using that research chemical than this stuff (at least at these kinds of doses).