Dopamine doesn't produce euphoria, quite the reverse.
The professional, medical, conventional neuroscience on the matter seems to point the other way. Cocaine also makes me feel nervous and riddled with anxiety in addition to an odd euphoric note in the background I would be remiss not to mention. To me, the bad far outweighs the good, never mind the exorbitant price and short duration. In my mind and understanding, this is attributable to norepinephrine more so that dopamine. But it's okay if you disagree. I also openly admit that we are all different, us humans, in terms of enzymologies and DNA, and it's entirely possible you don't process cocaine the way the majority of other people do, differently even from the way I metabolize cocaine, which I also hold to be an outlier. But the fact still remains that for most people, this is not their response, and I believe that you're mistaking what, to me, is an adrenergic response with that of a dopaminergic response.
Considering that dopamine is
3,4-Dihydroxyphenethylamine and adrenaline is
3,4,β-Trihydroxy-N-methylphenethylamine aka, β-hydroxy-dopamine, it stands to reason that few drugs will only affect dopamine but not adrenaline and vice versa, but it does happen. So, maybe I'm wrong, but in my best conjecture, I would say it's your adrenergic response to cocaine that causes the discomfort, not dopamine.
It's also worth noting that there are multiple kinds of drug-induced euphoria, some more appealing to certain enzymologies and body types than others. For example, there's opioid euphoria (from e.g.: morphine, Heroin, oxy, fent), GABA-based euphoria (includes ethyl alcohol, benzodiazepines, and GHB/GBL), psychedelic euphoria (LSD, 2C-B, aMT, 5-MeO-MiPT), dissociation euphoria (K, MXE, PCP), empathogen euphoria (MDMA/MDA, benzofury-class amphetamines, 4-FA, methylone), and stimulant euphoria (amp, meth, α-PVP, 4-MMC, &c.). Sometimes there is some overlap, and sometimes there's a very fine line between pleasure and pain. And like I always say: not every drug is for everybody.
Clofenciclan is criminally overlooked in my opinion.
It's interesting to me that clofenciclan is an arylcyclohexylamine. I'm not sure it's but so euphoric. I think there's a correlation between stims that affect serotonin and stimulant/empathogenic euphoria. Just a pet theory of mine, anyway.
What more can you tell me regarding clofenciclan? I'd like to learn more.