Pure conjectural or anecdotal but it is my intuition that there is something to it
Different organisms react differently to the same chemical substances. There’s a study linking ADHD and paradoxical reaction to stimulants:
Many people with ADHD have next to no reaction or react paradoxically to caffeine (coffee/black tea/cola) and other stimulants (nicotine, “Red Bull,” amphetamines).
Source: https://pmc.ncbi.nlm.nih.gov/articles/PMC3163785/
As I’m writing this reply, I have not yet been able to find any other studies that delve deeper into the matter, but it seems like it’s indeed a known phenomena.